So MobileMe and Yahoo didn't push at all to my phone, I PWNED with original 2.0 tool. Couldn't figure it out at all. RE-PWNED with 2.0.1 PWNAGE TOOL and restored iPhone from iTunes, and now Yahoo and MobileMe both push just fine. Exchange push doesn't work at all, everything I've read says it's a server configuration issue.
Anyone else had problems with Push? It's a major reason I updated to 2.0 at all.