I got a G1 on launch day, I've been a T-Mobile customer for over 7 years now; however I called T-Mobile to see if they could upgrade my dated G1 to a Nexus One (I'm not due for an upgrade until the end of July, but T-Mobile is famous for cutting loyal customers a break when it comes to that) and they said that unfortunately the phone is being sold through Google and it's out of their hands.
I was pretty psyched about getting one, but there is no way I'm paying $530 for a phone; bottom line, right now I'm an unhappy Android User, Google Customer, T-Mobile Customer, and geek. Instead I could have been $180 lighter and happy on all counts.
I guess I'm skipping the Nexus One and upgrading to whatever the next "must-have" is later in the year.