The biggest incompatibility right now is with mod_voicemail, which was released shortly after wikipbx was released, and I haven't had a chance to go back and make this work. It's a high priority item though. Wikipbx comes with its own voicemail IVR, but its rather simplistic and does not support things like MWI (message waiting indicator). The other thing to be aware of is that it is heavily SIP oriented, so if you are going to be using non-SIP protocols you will probably run into some issues. Hope this helps!

I didn't know about wikipbx until today and it looks like nice from the screenshots. Is it current with freeswitch in it's features support?

Brian