Because the content of RSS is largely text it is ideal for viewing on a phone's small screen. Here are some WAP based RSS readers. For more about mobile RSS readers see this item from the WAP Review Blog.
Posterous, the popular lifestreaming and instant blogging service,has mobile enabled all Posterous blogs using an attractive, one-size-fits-all mobile theme.
Posts include comments, which are displayed on the same page as posts. It doesn't seem possible to leave a comment with the mobile version.
The single-column mobile layout has an average front page size of 38 KB which should work with most phones. However, the individual posts are not paginated and images are not re-sized so post pages can get quite large. Source: The NextWeb
MediaHackers.org is the latest implementation of Dave Winer "River of News" style RSS agregator. Mr. Winer, who created the RSS 0.92 and OPML formats, originally lauched his NY Times River a while ago. It's was a site that combined multiple NY Times RSS feeds into a single constantly updated page.
Media Hackers features multiple rivers each in its own tab. There are tabs for movie news, podcasts, tech news, the original New York Times River, Apple, world news and several others.
Media Hackers is fairly trim with a page weight of under 500 KB but, unlike the original Times River, it isn't really mobile formatted, at least in my Android phone's browser. The page is wider than the browser's viewport and tends to slip sideways when scrolling through the news.
An independent non-profit that aggregates the best posts by over 300 bloggers and citizen reporters from around the world with an emphasis on non-Western and underrepresented writers. The site advocates for freedom of expression and provides a place where censored voices can be heard. Global Voices is translated into 30 languages.
LiveJournal is one of the oldest blogging platforms, launching in 1999 and remains one of the most popular today with over 23 million users. In addition to being a free platform for publishing a personal blog or journal, Live Journal has strong social networking features including group blogs (called communities), profiles and friends lists. Individual posts and entire blogs can be configured to be readable by friends only.
Live Journal, like VOX, MSN Spaces and WordPress.com is another blogging platform that automatically generates a mobile friendly edition of each published blog. Unlike the others, Live Journal doesn't appear to use browser detection to redirect mobile browsers to the mobile edition. Mobile LiveJournals have non-intuitive URLs like m.livejournal.com/read/user/journal_name The easiest way to find a specific mobile journal seems to be by using the search engine on the main Live Journal mobile site at m.livejournal.com/read.
WPMU is a great resource for anyone who runs a WordPress site. The site's name suggests that it's about the, now-depreciated, "MU" multi-user/mult-site version of WordPress. It's not, WPMU.org is the largest, most popular general WordPress specialist site that's not part of WordPress.org itself. Packed with WordPress lore, news, tips, tutorials and theme and plug-in downloads that should be of interest to anyone who runs a WordPress or BuddyPress site.
WPMU.org uses a "mobile-first, responsive" style which means that the site adapts itself, using mainly front-end or client side logic, to a wide range of browsers, both desktop and mobile. In a post about the design, one of designers talks about howthe "mobile first" approach means that mobile devices don't have to download heavy graphics and other resources intended for desktop browsers.
The design targets devices ranging from modern mobile browsers with a screen width of 320 px or more on up to the desktop. I tried it in the Android Gingerbread, Opera Mobile 12, Opera Mini 7, Firefox Mobile 12.0, WebOS 184.108.40.206 and Symbian Belle mobile browsers and with Chrome, Firefox and Opera on the desktop. The site looked good and worked well on all of them which I find pretty impressive.
The mobile first approach worked pretty well too. according to Opera Mobile the page was a relatively svelte 247 KB while in Firefox on the desktop it was 1184 KB.
DISQUS is a blog comment system that provides a single sign on for commenters on all blogs using DISQUS. It also supports sharing comments on Twitter, Facebook or Yahoo. The mobile version of DISQUS lets bloggers moderate comments on their sites.
MyWapBlog gives you an easy to remember and key on a mobile subdomain URL. Mine is wapreview.mywapblog.com. Users can leave comments on any post. There is no comment moderation system, comments are published as soon as they are posted. This could be a problem if blog SPAMers discover MyWapBlog. Comments can at least be edited or deleted after they have been published.
There are also no RSS feeds available, something I consider essential in a blogging platform. The lack of feeds is a bit of a show stopper for me as I depend on Bloglines Mobile to keep up with what's going on in the blogosphere.
MyWapBlog lets you upload images directly from your phone to your blog using a "browse for file" based image manager. Uploaded images can be inserted anywhere in posts. Unfortunately, not all phones support direct uploading and there is no option to upload by email or MMS. If your phone can't upload images, a work around is to use Opera Mini 4.1, which can do uploads on many (but not all phones). It is also possible to upload images from a PC. MyWapBlog is a pure mobile play, there is no full-web version, but the mobile site works fine with desktop browsers. Images are re-sized when uploaded. You choose Small, Medium or Large when uploading, which correspond to maximum image widths of 115 px, 169px and 235px. Both GIF and JPEG images are supported. Transparent GIFs lose their transparency when uploaded, however.More...
Original Signal Web 2.0
Original Signal's Web2.0 site draws headlines from 18 top blogs including GigaOm, TechCrunch, Mashable and Micro Persuasion. Clicking a headline takes you to the original blog post transcoded by Google.
Another RSS feed mashup similar to Original Signal. This one has the 5 latest items from digg, del.icio.us, newsvine, reddit, google news, slashdot, fark and 11 other web 2.0'ish sites. The actual articles are filtered through Google's transcoder to make them mobile friendly. Unfortunately, the popurls mobile home page has almost 100 links on more than most phone's built in browsers can handle. 10 links is the GAP recomended maximum for usability on mobiles, the Openwave browser on my phone gets very slugish with more than 30 links on a page. Opera Mini and other full browsers can handle popurls.mobi OK but if that's the target class of browser, the Google Transcoder is redundant.