I assembled the first USBreadboardIT unit, completely by hand (have I mentioned that USBreadboardIT have been thought with hand-assembly in mind?). D1, that is the "power" LED tied to VDD, lights up when connected to power, so at least the power works, both at 5v and 3.3v :)

Regarding the microcontroller, I used a PIC16F1454 because it's bigger brother PIC16F1455 (with analog capabilities added) was out of stock when I tried to order it. They are pin-compatible, so USBreadboardIT will work anyway.