I've had an unlocked T-Mo G1 on ATT for a few months now. It is linux based, but not as open as I would like.<br><br>There is a huge developer community behind it however. With a custom rom you can even have root access. Yes I can ssh to my home network from my cell. :)<br>
<br>The only downside is T-Mo's 3G frequencies are different than ATT, so you'll have edge at best. But the phone does also do 802.11b/g wireless that helps make up for it.<br><br>Shoot me an email off list if you want more info.<br>
<br><br>