A site called spoilertv.com has photos up from the first day of Iron Man 2's shoot.  Here's one.  You can see a few more after the jump, including Don Cheadle as Rhodes, posing with a cell phone like he's the new spokesmodel for Verizon. 

Here's that one with Cheadle on his phone.  "Can you hear me now?  Wait who's this?  Terrence Howard?  Oh, man... you're breaking up... KShshshshhhsssshh!"

And here's one with Cheadle in full War Machine costume.

Head on over to spoiler tv for the rest.