tgregi,
Welcome to the forum . . . wish it were for better reasons, but at least this one is easy.
Short the bootloader pads on the back -- I'd recommend by a drop of solder unless you want to hold tweesers on the contacts for the entire reboot. plug it back into the USB and reflash following the "recovery/lost communications" instructions on the reflasher page (in yellow).
Disconnect the bootloader pads, reboot . . . and join the club of folks who have had to fix it the hard way. Hard lesson learned, but if you're like me, you'll never touch UART1 again