Another way of grabbing some feeds is using Yahoo Pipes - this lets a user combine ("pipe" ) different rss
feeds into one single feed.
Once a "Pipe" has been set up it's just a matter of grabbing that one address and putting it into Akregator (or another rss app or web site etc)
The downside is needing a Yahoo account
I think this "Pipe" shows Software Announcements - Tex identica - Tex Twitter - Package Requests