Documented bugs regarding VMPS are found in 6.1(2)(CSCds66629) and 6.1(3)(CSCdt25320, but undocumented bugs may apper in 6.1(4) or above.
The Catalyst 6000 family switch can function as a VMPS server.
A complete guide can be found at:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sft_6_1/configgd/vmps.htm