A huge list of blogging software. Must read if you're not satisfied with your blog posting solution.
I'm also trying out Sauce Reader. It's aggregator and publisher in one package. It look really cool and after 15 minutes of quick testing I'm really positively surprised! I was using SharpReader as an aggregator and BlogJet for only occasional posting since it has a nasty bug (editing posts) a a missing feature (spell checker) and it's no longer free.