Hi,
For the move to Windows 7 for our enterprise customer, we moved completely away from roaming profiles and used folder redirection for a large portion of the users enviroment. The users homedrive was also home to a redirected desktop and other functions that gave the appeareance of a romaing profile.
As for the homedrive on the move. You need to have the correct GPO settings for synch centre and all laptops users must intiate a first time sync before loggong off the network and going mobile.