Vincent, does the pro version with the ad removal also allow users to insert their own ads instead? It's not so much that forum owners object to ads in general, I think, just that they prefer putting their own ads instead.
The single sign on thing is interesting. Is that an integration script that works for various or does Lefora use an API for that, which can then be modified to suit users' needs? Speaking of API, if you don't already have one, then you should consider developing one. Part of the success of services like Facebook and Twitter is because of a developer API that allows users to extend the core capabilities of the service.
Regarding the limited control thing for admins, I think I'll need to have a closer look at Lefora before I suggest anything. It's different from script to script, so I have to know what Lefora can do before I worry about what it can't do. I might take you up on that offer to test Lefora out, actually. It'll be interesting to see how far the boundaries of forum and community software can be pushed.
