rbRSS is a Ruby/Gnome2 RSS aggregator.
It uses libglade to avoid most of interface code.
The current version has no interface for editing preferences so you need to edit config.xml by hand to add or modify a RSS source. Suppression works fine with the interface :-)
rbRSS is currently available in English and French.

0.1 is out but threading needs great improvment. I'll try to have a 0.2 next week (end of October).