After re-reading the release notes, I need to clarify some of my statements from above. Online upgrade is only available on controllers equipped with 512MB or more of RAM, which at this point would be a 1400-user LX, or MXe.
Also, I've stumbled across some issues with the IP set firmware. First, the DSCP setting sent to an IP set via DHCP option 134 is ignored. Not sure if this is also the case if you use option 125 instead, I'm doing more testing on that today.
Also, I've noticed issues with the more recent Cisco IOS updates and CDP. Normally, when CDP is used to send the VLAN information to an IP set, if no COS priority is specified, the set should default to 5. Since one of my customers upgraded their 3560's to a new IOS (12.2(40)EX), the IP sets running the 8.0 firmware have been coming up with COS Priority of 0. However, when I first connect a brand new phone, which I believe is factory loaded with the 6.1 firmware, it comes up with the correct COS Priority. Again, doing some more testing on this, checking each IP set firmware load from 6.1 to 8.0 UR1 to see if there was a change somewhere along the line.