I figured out how to sync my Gmail for domains! If you have a domain and get your domain's email through Google, here's what I entered to have my email, calender and contacts sync through Froyo email.
The changes that worked for me were:
1) In the Domain\Username section add the domain name for your account. For example, instead of leaving the default
\username, you would have
\username@mydomain.com.
2) In the Server section, I put
m.google.com.
Plus I got my DecalGirl skin in the mail today- so it's a good day for me all around!