I am very impressed with #Develop. Mike Kruger et al are doing a very, very good job. If you are looking to join an opensource development project with some steam, a worthwhile vision, and credibility, you should really check this project out. It isn't quite up to the standards of VS.NET03 but for free it is INCREDIBLE.
I would really like to see some of my favorite tools like Regulator and Reflector integrated with the IDE. The IDE does have a RegEx editor but it isn't Regulator and there is only one Reflector.
The only serious feature that I didn't see that would keep it from being used by every one is Source Code Control. Is the feature not there or did I miss it. I would love to talk to the guys/gals on the core team but hey, we are all busy people. Maybe when I take a vacation.