I switched over to Vienna as my main feedreader once the Great Google Reader Diaspora began. Until there’s an obvious choice in alternate feedreading-with-sync market, I’m back to the old era of downloading feeds directly. As a relucantly-former NetNewsWire and Reeder user, I’m damn impressed with how snappy Vienna loads everything.
LucidaGraphite is a Vienna style-sheet based off of the FeedLight style. I prefer Lucida Grande in black as my primary body text font and, well, perhaps someone else would like it too.