Thought I'd try resurrecting this thing...

Playing around with Windows Live Writer, which seems pretty good. Using it to post this in fact. Nice small app, integrates with (from what I can tell) most blog types and obviously Microsoft's Live Spaces. Supports plugins too, which is always a good thing!

Blogger doesn't allow posting of images, but you can host them on your own site.

Probably not as good as Performancing for Firefox, but it's worth a play.

You can download it from here.