We need an upload space where people who care & have the time can test new features on an active (but unpublicized) site before the features go live...

I have the wikipedia software (and my in-progress reorg of it) running on my own site; the few changes I made I tested myself, but before I do anything major I'm sure I will point everyone to my site and let them bang on it. I'm also open to the idea of using my server as a general test area, and I'm willing to give accounts to some of the developers if that would help. 0