Scribefire is a very useful extension and can even upload images to blogger but has a few annoying "bugs" for lack of a better word.

Scribefire pre-release and dark-themes (gtk) don't mix well (it looks very ugly). Scribefire current release works better with dark themes but not perfectly.

Scribefire can upload images but does not upload them to the standard server (it uploads them to "Picasa web albums") and, unlike the default editor, it simply places a shrunken version of the image on the webpage and does not link it to its bigger version. This is easily fixable but annoying (especially when using lightbox).

Too many features and few options to trim down the UI.

Verdict: Fun but not for me (yet).