Is it possible to activate an android device using a 'google apps' account I'm using Google Apps for my personal domain and email.

Is it possible to use such an account (e.g. "name@mydomain.com") to activate an android device?
Yes.

Few years ago, Google Apps services were separate from normal Google services. Even cookies were different &amp; compatible to each other. From last year, all Google Apps accounts are normal Google account (You'll have to sign out from normal Google account if you want to sign in with Google Apps account in a web browser).

And, it supports Android too. I've tested it.