I use straw under Linux for my news aggregation needs. If you haven't checked
it out, you should. The website is here:

http://www.nongnu.org/straw

Anyway, I get my feeds from syndic8.com. You can see a list of the ruby sites
w/ RSS here:

http://www.syndic8.com/feedlist.php?ShowMatch=ruby

On a side note, is there any reason that ruby-talk doesn't provide an RSS feed?
Maybe it's impractical, but it'd save me a good number of visits to slrn.

-Travis