The OpenKomodo project was just announced.  They’ll be building their own tools off this same platform.  Could lead to some seriously nice open tools.

OpenKomodo’s licensing will apparently be three-fold.  The mozilla public license, GPL, and LGPL.  This should definitely give plenty of freedom in extending the system to great FOSS applications.  Imagine having a firefox built out where firebug-like tools became the norm of your environment.  Very nifty indeed.