That sounds awesome.
I haven't seen any decent level editors released to the community yet.
I
have heard of countless people mentioning that they are making one. That makes sense since you really need an in house editor to make any sizable game. As long as it's easy to use and flexible enough to be used by any 3d game type, it'd probably be popular. I doubt most of the others'll get finished.
Personally, my game idea includes needing the editor to work in game... So, I'm probably not included in that pool unless I had the source.
Lots of others would probably be happy though.
So, is it indoor only, or indoor/outdoor?
What kinds of features?
Is it compatible with Blitzwerks terrain? If it's not, you may want to consider adding that option if you hope to sell it. Popular plugin right now.
EDIT:
Just noticed that you mentioned CShop. The character animation builder? If it works with actual modeling/animation, then there is one program being worked on that does something in that genre.
http://forum.thegamecreators.com/?m=forum_view&t=170674&b=8