AmphetaDesk / Radio + autodiscovered RSS feeds
Found these hot little things via Phil Ringnalda and via Matt Griffith: Mark Pilgrim's Amphetadesk Auto-subscribe bookmarklet and Radio auto-subscribe bookmarklet. So, now when you visit the site of someone who's joined the RSS autodiscovery via HTML LINK element bandwagon, you can snag their RSS feed into your aggregator.
This makes me really want to get back to studying some in-browser scripting and DOM manipulation. It's been awhile since I played with that, and I see more cool things done with it all the time.
Tasty. Now I just have to wrap a few more things up, and I'll hopefully be contributing an updated Cocoa-based OS X faceplate/installer for AmphetaDesk to Morbus before the weekend's out.