Nope.
However, I saw some news where a tweaker is working on a tweak to do exactly that. Of course, I didn't save the article or anything like that. I would assume a Google search would bring up the specifics.
What I do remember is the article was (1) pretty impressed with the feat (the guy was running two different Angry Birds games) and (2) it may come out within the month.
Short story: No - but stay tuned!
Marilyn