We have a 6500-WiSM, 1131 LWAPPs, a WLC and a Location appliance. I just upgraded these all to the latest version 6.0 from 5.1X - both the 6.0 software and 5.2 emergency bootloader on the Wism.
We now show about 25% out of service radios across our AP deployment.
All the ethernet interfaces are up, you can connect and configure the individual AP's - you just can't turn some of the radios on.
Some will have both A/BG down and some only one or the other radio.