I've had a withdraw that says "waiting" for about 18 hours or so at this point.  I sent their support an email about it this morning but have not heard anything back yet.  When I get some time later I'll drop into their IRC channel to see if they can look into it.

Edit:  Went to the IRC support channel and was told he is aware of the withdrawal issue and is working on it.  I did not ask for an ETA though.