This isn’t a bad list but im guessing that people from different sides of the open source debate might have a few subtracts or adds for this.

i personally think the most exciting thing happening now is the bookmark/opml sharing services like del.icio.us and loomia. These are already helping me fine tune searches for new sources of information. Basically (and all i really know is loomia for my podcasts so ill stick with that for my example) you generate a list from your RSS feeds that you subscribe too. These are grouped in an .OPML file. You input that file in to loomia. Now it looks for all the ones you have and compares it to the others members and can find other people you have a large percentage of your podcasts with. Now you can get either a list of Recommendations based on...well if you tell them you really like the Diggnation podcast it looks at all the other people that like it and shows you other things they like. it also compares Tags so if you like a lot of music shows it puts more weight in music shows in your Recommendations. You can also just look around at other customers OPML lists or do searches for Tags or types. i don’t want to talk on and on more then i have. i know there are more service out there that function this way and would love to hear your take on them if you use them. And i can’t end without some odd bit (just ask your self why). Nighters, g