Nice idea except I can't seem to make it work  :( 
http://performancing.com/firefox is it and http://performancing.com/node/601 seems to be an explanation of how to make it work with b2evolution, but I ain't getting the goods out of it.  Seems to me it's a heck of a lot easier to just open my blog in a new tab and copy/paste the title and link-to-url and content snippet.  I miss justblogit, but that went byebye when I upgraded to FF1.5.  Stupid upgrade!!!
Anyway: has anyone got this stupid performancing thing working in a user-friendly manner?  Care to share how?
Never mind!
http://blog.warmbrain.com/justblogit/ works in FF1.5 although FF doesn't seem to realize that.