It supports multiple blogging sites like the Windows Live Writer that I blogged earlier ()
The text editing is quite standard, the fonts, bold, italic, underline, font size color, alignment, bullets etc.
Inserting link and youtube links are simple as well.
For pictures, it supports drag and drop from any folder in linux (should be the same in windows) and the alignment of the picture is on the same toolbar. Resizing the picture is as simple as clicking on the picture and resize it.
What I really like here is the Categories is at the right side tab which I prefered more than the Live Writer (Which is a drop down). ScribeFire also lets you choose more than one category.
Technorati, del.icio.us, Digg, etc are all supported.