Usability 
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.