Just a few comments about http://composite.mozdev.org/ :
  1. IMHO, this is a superb add-on to the browser ; for blogging (I am going to use for my blog) or auction sites, it's a must-have !
  2. I wish the new composite window could be positioned on the screen so it "covers" the original textarea
  3. in fact, I wish all the contents of the composite could replace the textarea in the original document when the user type ctrl-e and revert to the textarea when he/she types ctrl-e again....