First off This a BIG Thanks to Raj for helping me with my imail to zimbra migration!!! He spent his time and resources to make his tool work with version 10 of Imail. Without his help I would be stuck recreating hundreds of user's accounts and domains. Thank you Raj!!
I have tested the imail2zimbra application with creating domains, users, aliases and forwarding and it works great. Unfortunately it doesn't seem to import address book information, but I don't need that functionality.