April 2006
Welcome to Diffbot
by ycc2106 & 1 otherDiffbot lets you keep tabs on any page on the web, whether or not it has an RSS feed.
March 2006
Grazr, you know for feeds...
by ycc2106 & 20 otherslittle AJAX tool for browsing feeds (and apparently other info types) in a tight little window that you can include in your own webpages.