I've been working on my GSSL Control project lately. I've designed a PCB for it, and got it back from fabrication. I managed to solder all the SMD stuff without incident so far. I've got a debug LED flashing, which is a good start. I'm using an AT90USB1287, and was planning on just using the DFU bootloader from Atmel, but it turns out that the USB bootloader can't program the fuse bytes. I had to dig out my USBasp and do some dodgy wiring to program the fuse bits to turn of the CLK/8 bit. Now I've done that though, the USB bootloader should be fine. I'll try and update the project page when I get some time.