Is there any way to do a port span or tap of all traffic going to and from a WiSM? You can't seem to monitor the port channel that goes into the controller.
Sure, you can set the port-channel interface as the source of the monitor session.
lab1sup720ip1(config)#monitor session 1 source interface ?
FastEthernet FastEthernet IEEE 802.3
GigabitEthernet GigabitEthernet IEEE 802.3z
Port-channel Ethernet Channel of interfaces