Today I've released PlopFolio.
PlopFolio is a clone of Serence's excellent KlipFolio application. It is written in Objective-C and uses GNUstep/Cocoa (so it works on Apple Mac OS X, Linux and stuff). PlopFolio supports Klips (RDF "news channels") available from KlipFarm.
You can see a screenshot of PlopFolio here.
Also, GNUMail.app 1.0.2/Pantomime 1.0.4 should be out tomorrow or on monday. I'll write more about this once I release them...