Following this post, I have been able to get into recovery mode. Be sure to download the RockChip flashing tool at the link and unflash the zip somewhere convenient on your PC. Plug the PB into a USB port and, using a paperclip, hold the Vol Up button and press reset (hole next to the power button) at the same time for about 10 seconds. Release them and the PB will reboot into recovery mode. My copy of Win7 didn't have the drivers. After the long attempt to find the drivers, Windows will fail gracefully informing you it didn't find the drivers for the new device If you look in the RockChip folder you created earlier, there is a folder called Drivers. Open Device Manager and find the unknown device. Update the driver from there pointing it to the drivers folder. Waa-la!
Important- make a backup! Store it somewhere safe! You have been warned!
Update! It has been brought to my attention that recovery mode can simply be accessed by holding the Vol+ down while plugging the USB cable in. Wish I had known this when I was flashing mine, as my kids have (literally) worn the reset button out on the original factory firmware.