Cloaking device--where's Spock when you need him?

[onionhead]

http://www.msnbc.msn.com/ID/15329396
I'm waiting for it to show up on ebay.

[Yaddo 42]

Or in a Venture Brothers yard sale.

Makes you wonder how much power would be needed for a practical device and if it would have to used in conjunction with methods of masking heat signatures or electrical signals say in military applications. Vehicles give off other signals besides visuals and radar signatures. If it could made small and portable enough, the uses for scouting, observation, and infiltration would fantastic.