ScribeFire is a popular desktop blogging application hosted in a Firefox extension. Version 2.2.8 includes fixes and some brush-ups. The extension is free to download from Mozilla Add-ons, and works with both Firefox 2 and 3.
Thord Daniel Hedengren is a designer, writer, and blogger, and also the former editor of The Blog Herald. He used to be a hotshot in the gaming industry in Sweden, but sold everything and went International. Most recently he wrote a book called Smashing WordPress: Beyond the Blog, and does loads of kickass design.