I just installed the Performancing Add-in today and it is pretty snazzy. It seems to work fine with dasBlog, which is exactly what I need. It supports categories and will also pull in previous posts and allow you to edit them. It also has some pretty good formatting capabilities. If you can read this post, then I can highly recommend Performancing!
UPDATE: It worked fine… I like it a lot! A very quick and easy way to blog, and from within your browser, too! Sweet!