Boy does this suck for Zynga employees. I really feel for the former OMGPOP employees as well- looks like Zynga has taken them down with them. I know that OMGPOP were desperately short of cash themselves, but at least they were the masters of their own destinies.
EDIT: and I wouldn't be too smug about their downfall if I were you. There could be repercussions across the tech sector if Zynga totally fails.