This doesn't seem to work with Google Apps for Domains accounts. Another interesting service I can't use. At this point I wish they'd release a tool or some mechanism for me to move my account to a normal GMail account.
I'd be very curious why this is? How are the Apps for Domain accounts (technically) different from standard Google accounts? I honestly thought the only motivation Google had for all these various services was user growth, it seems like a bit of a wast not to force-feed Gmail accounts down everyone's throats. They explicitly say that they'll keep all metadata on your use, and index all your content, as far as I know, for all their services -- so I can't imagine there's all that many reasons to the difference be anything more than a tag/group membership to flag any old google user as also an Apps for Domain user?
At this point I just assume that any new Google service won't work for me. There's no rhyme or reason for the exclusions so there's no way to predict them aside from a roll of the dice.