I am excited that Tmo will likely have a tegra phone, however the Atrix is also a good contender purely spec wise, and it will supposedly get a software update for 1080p recording. However Motorola may have a more locked down phone than LG. One thing Id like to hear is the sound quality of the LG phone, as the main reasons for a unified device like this one are:
camera (still and video)
If it fulfills those roles, then it will be great to be on a relatively cheap network compared to ATT/Verizon.