Easy way to push email to phones,

So the bosses went and purchased the new Sprint PPC-6700's and they would like to receive their emails on their phones. I would imagine that I would need to get Exchange running in order for the emails to push out to the phones. Are there any alternatives to using Exchange? Right now I have EX2000 and only really need 2 users to be able to receive their email on the phones.

So what would be the best/easiest way to make this work? Any online places to look for information rather than MG and M$?

 

There should be software that comes with the phones to synch email from their outlook boxes to their phones. Is that what they want?

 

They would like to be away from the office and receive email via the cell phone. Activesync will work if hooked up to the PC, but they're going to be traveling a lot and are not going to be around laptop/internet.