I've started up a repository of avr32 packages. Is it .debs or .rpms? No. Although the newest busybox has built-in support for these 2, they are still big, kinda complex and most people don't have new busybox anyway. The packages are ipkg packages. From the page linked below you can get ipkg and ipkg.conf. Put them on your avr32, run "ipkg update" and "ipkg list" to see the packages I've got. There aren't heaps of them yet, but many many more to come!
The whole idea is a community thing, if anyone has any binaries they think others would benefit from, please, please, please submit them! There's a Contributing section explaining how to go about it.
If you've got anything as .debs or .rpms you can email them through too and I can do a conversion without much effort :)
The libraries on there are, at the moment, really just useful as dependencies for other packages. When I get a spare millisecond I'll put up some -dev versions of the packages with the headers in so you can link against them too.
Have fun and once again, please, submit any binaries you might happen to have around!
p.s. The main source of confusion is likely to be wget. The one shipped with busybox doesn't work with ipkg. On the linked page you can download a binary of GNU wget which will work. The problem is that my web server has a really odd buglet where you can't download anything with wget in the name. Or I'm doing something wrong. Either way, you have to download the binary called 'wgt' and put the 'e' in it yourself when you copy it to /usr/bin. Annoying.