[steadicat]

Doesn't work if you're also using Google Sync. The iPhone will only let you add one "Exchange" account.

We just have to wait till Google implements push for Gmail.

[Skeuomorph]

Far as I can tell, this isn't an exchange account, just an unread email badge.

I say far as I can tell, because during the registration, when I saw they were asking for password instead of using SSO, I abandoned.