Just set up Google Apps to work on my bodyhacking domain. mail.bodyhacking.com will now lead to a custom gmail interface. Not sure what to do with it yet, other than it just being used for me to experiment with changing DNS records and playing with subdomains. I may use it as an incentive to “premium” users, if I set up premium accounts.

Seems like a good way of introducing people to a familiar interface, along with getting them a different email address.