Usability 
PhoneFavs wants to be your mobile web home page. The site combines a mobile portal, a search form for all the major search engines, a social bookmarking service, a web to mobile transcoder and a mobile software store. None of the pieces breaks any new ground but together they provide a useful starting point for exploring the mobile web and creating your own custom web portal.
To get started there is a directory of around 300 well chosen mobile web site links. You can browse the directory, trying out sites. When you find one you like, you can add it to your personal My Favs directory by clicking the "My" icon that appears next to each listing in the directory. PhoneFavs can also import bookmarks from del.icio.us, Firefox or Internet Explorer.
You can also add sites from your PC web browser using a bookmarklet. Some mobile browsers support bookmarklets as well, including Opera Mobile and Mini, Mobile Internet Explorer and the iPhone's Safari. I've added the PhoneFaves bookmarklet to the Yeswap Opera Mini Bookmarklets page. Visit o.yeswap.com to add the PhoneFavs bookmarklet to your browser.
31-Dec-2014: Phonefavs no longer offers a mobile bookmarking service.