Just a few days ago we gained the ability to flash custom ROMs to the HTC Touch Pro 2 on T-Mobile. Now comes an unlocker for the Verizon Ozone, aka the HTC Cedar.
Note that this DOES NOT work with Maple-based devices such as the Sprint Snap and T-Mobile Dash 3G. In fact, says XDA creator jockyw2001, "Running this sspl on a Dash3G will definitely brick it." So, there. If you do want to flash a Dash 3G, hit up this thread. Sorry, Sprint Snap folks. No flash for you. Yet.
If you're ready to customize your Ozone, check it the thread here, and be sure to read all the instructions first.