Carl,
I’m not sure what functionality you are looking for (or what OS you are using).
For Windows, I have used wbloggar and found that pretty helpful.
I am currently stuck on the Performancing.com extension for Firefox. It does most of what I want, although it has some issues with posting code (although, so did the WYSIWYG editor in wordpress… code is a tough nut to crack).
Both of the above support multiple blog formats (WordPress/MT, Blogger, LiveJournal, etc) so if you have more than one blog, you can post to all of them pretty easily.
Sorry for such a short list, but these are the only two I’ve used. I know there are a slew of them out there
You mean edit/create posts without using a browser/admin-write-post interface?
Only thing I have looked at is BlogDesk http://www.blogdesk.org … It looks ok, but I haven’t actually used it for much.
If you do, please report your experiences back here ;’)