Have a TMo Family Plan?
I just spoke to a TMo representative and I got excellent news. When purchasing the Nexus One, it immediately comes with the Even More Plan, as we all know. HOWEVER, once you get the phone and activate it, TMo can then move you to a different plan.
For instance: I would move from the Individual Even More, etc. plan to an Even More for Families plan that will cost the same as my current plan. The single plan option is just a way of streamlining the transaction for Google. TMo can work with you once you're established. The one catch is that if you have a MyFaves or anything older than the current Even More plans, you will have to move to an Even More plan.
I'm still not happy with Google, but TMo is working with the customers to make life easier. Hope this helps!