I installed SF internally on a client site, and the developers are going ape over it. They love the community building aspects (ratings/code snippets) and were already needing some sort of project management/bug tracking system. SF beats Bugzilla hands down, in my opinion.
I think SF does add value by tying all those disparate software packages together into a simple user interface. I want to do the same things, only better and more easily.
And I want other organizations to be able to host internet-based development just like SF.net does. See savannah.gnu.org, who took SF's source and modified it painstakingly because they needed similar functionality. It shouldn't be so hard!
jpt