I would also hate to see this project just stop dead in its tracks. I'm very new to WoW addon development and I believe I was "told" about this wonderful IDE in the Second Edition of the book World of Warcraft Programming by James Whitehead
and Rick Roe. (http://wowprogramming.com/)
Using AddOn Studio has made my first project much easier and I can see how much it can do for a someone completely new to programming (which I'm not...but I like good tools anyway).
Guys, please don't let this project slip into oblivion. You have a wonderful product here that anyone who buys the Whitehead/Roe book will know about. I truly hope that you continue development.
Thanks and great work!