RSS Reader?

my last request for software suggestion was so sucessful, i thought i might try it again. Sry if my boring straight forward opinoin based questions are poor form... just yell at me and ill stop.

I read like a billion websites regularly. And RSS is a time saver. What RSS readers do people use?
Whats the coolest solution? I've generally been just using the 'live bookmark' functionality in Firefox, but my nested folders are begining to get a tad untamed. I'm trying thunderbird, but, eh. I like to look at the content in my browser w/ their design, not jsut the plain text, usually.

Any suggestions?

free, gnu/gpl, open source, is obviously the way.
thanks in advnce.

Generally I just use Thunderbird.

my psp for podcasts..

thunderbird or google reader for others

I use Google Reader, mainly because I can access it from wherever I have an internet connection :)