EDIT: Okay, have tested it. A wonderful extension, very stylish, and does a lot of sophisticated stuff simply. I contribute or provide admin services to several blogs, and in one fell swoop it imported all the blogger ones, and provided a lovely interface to it. Very nicely done *wears his very impressed face*
Performancing for Firefox 1.1.1
Very handy extension for Firefox, blogging toolbar. Testing it out just now.