Just got my 2 STM32F3 boards to emulate on USB! So got the USB DFU bootloader working :D
Naturally here are pictures:
http://pic.twitter.com/MC5vt6ovlZ
http://pic.twitter.com/ZLB7G5gD8j
http://pic.twitter.com/GDeOrC2aKN <- Damn, missed these 2 being soldered together some how, fixed it and it worked after I then fixed the ESD1 chip.
Thanks to ala42 for giving the fix, gbulmer for designing the boards and ventosus for getting the F3 discussion going and trying it out.