Contacts and calendar from WinMo to Evo?

[Da Uniq 1]

I'm confused. Let me simplify my question.

I have Winmo. I'm going to Android EVO when it comes out.

I already have a Gmail acct and the contacts are simply mirrored from my yahoo.

I have certain info in yahoo vs my phone which is why I never set up a yahoo acct on the winmo phone.

Example. My brother. On my Win Mo, I've got 3 email addresses for him and 4 phone #'s. In Gmail, I have those 2 different address and one different phone #.

When I get any android device and Bluetooth the info from Win Mo to Android so I can have the specific info I want on the phone, if I use my existing gmail acct to log into the android device, will the phone info and gmail info get merged?

Cuz to me it sounds like I'm gonna have to revamp my gmail acct or use a different one.

Thanks in advance