Getting MobileMe to Push, try this

[drumit]

I couldn't get any mobileme push actions to work until I did these following steps in the following order

1. Remove all mobileme mail accounts from iphone
2. remove all mobileme accounts from computer
3. unregister all registered mobile me computers
4. sync your iphone (so nothing is synced)
5. add mobile me account through system preferences but do not sync anything on mobileme
6. sync your mobileme settings on your computer one at a time, contacts, calendar, etc.
7. Once your computer synced everything with mobileme, sync your iphone again
8. turn on the push settings on your phone

i hope this works for you all as it did for me.