Welcome to the forums,
12:34, 18th Jun 2008 golfermanpete Thread title (original 'Migration issues from Google Apps') changed
Sounds like he figured out how to get whatever imapsync solution being used at the provider to work - or just imported it with Zimbra's external account aggregation then disconnected the account & moved folders under his ZCS account:
I'm sure sales [at] zimbra.com can provide you with plenty of Zimbra vs Google comparisons if you'd like
Or there's always an archived webinar on it:
http://www.zimbra.com/about/webinars.html