We still do not have a fully compatible RIL that allows official CM7 releases to work on the Thunderbolt. In it's current state, CM7 is heavily modified/hacked to work on the Thunderbolt. Until we have a fully functional/compatible RIL, don't expect official CM7 releases to work on the Thunderbolt.
I have been using it off and on the last two weeks and for the last day or so its been my daily driver, and I don't think I will go back. It has its quarks but nothing that puts it behind stock, its still got a ways to go but I cant complain.