Good WPF forum?

I'm looking for a good,  ACTIVE  WPF developers' discussion forum.   I'm already a member of http://social.msdn.microsoft.com/Forums, which is pretty good, but sometimes I stump them or nobody finds my question interesting enough to answer, so I'd like an alternative for those times.  

Most of the WPF forums I've found are like this one  - very low traffic with lots of questions with "0" replies even after weeks.  

Thanks in advance.