I just got mobileme when upgrading my macbook to a pro.

I currently have two Gmail addresses and one university address. What is the best way to integrate these so that I can use them on MacMail, as well as mobileme, for push? I'm getting an iPad next week, as well as an iPhone in September, and hope to be well used to whatever system I have by then. I need to be able to send mail as my gmail and university addresses.