Two I've used in my campaign are:
I have already talked about them under another thread in the GM's Eyes Only
section of this board.
A somewhat out-of-date web-site on UNIT-M
can be found at: http://clumsycrusader.tripod.com/
group has been recently resurrected after too many years of neglect and, as soon as we've had a chance to run through a few more adventures, you can expect I will be posting some interesting plot points and ideas for others to use.
Their first adventure since returning to active duty involved the Norse God of Thunder Thor Odinson
(not the wimpy Marvel version), The Corvis
(see his illustration on the M&M Fan Art site), a heavily modified Mountain King
) and a big honkin' Dragon
...oh yeah...and the Statue Of Liberty too...!