Here's what I did:
1. Installed the Widcomm bluetooth driver on my pc:
http://www.broadcom.com/support/bluetooth/update.php
2. Connected my USB-less phone to my PC via bluetooth
3. Transferred my stock rom, renamed to DIAMIMG.nbh to the root of Internal Storage
4. Held "Power+VolumeDown+Back" and pressed and held the reset button with my stylus.
5. It entered the bootloader and I had to press the power button to get it to flash after that. Worked like a charm. Stock ROM installed, USB came back.
jakewill