I have a Teensy, one of these to be exact.
Teensy AVR USB Development Board (SKU: 52050) - HVW Technologies
If I can find it you can have it for shipping. It was given to me and I have yet to use it honestly. It has the ATMEGA32U I do remember that. I will dig around my "drawer" and see if I can find it. One more reason I posted here is to let you know the Minimus is also a great board for projects other then jailbreaking as I got mine well after the 3.55 CFW's came out and I have been having a blast just adding my own code. I got the idea from the AVR Prankster but they are common and fun to use so you should keep an open mind to one of those as well. I just like it as it has the male USB end and a sweet case to protect the board. It uses a AT90USB162 Atmel board as well. Anyhow when I get home I am going to look for it and if I find it then it is yours. Oh check out the PS3uKey as well for dev purposes outside of jailbreaking, open bootloader and Atmel chipset in a nice case for a cheap price. Super clean looking and comes in Atmel and Atmega flavors.
PS3 CECH-2501A [CFW] & CECH-3001 [OFW]/ PS2 SCPH-3901 & SCPH-7501/ PS Vita TV PCH-1000
MOD Custom Cobra 4.46 v7.00 w/ E3 Flasher [CFW] & Cobra ODE 4.53 [OFW]/ Mod HDD-OSD [Phat] & Modbo 4.0 [Slim] / FW 2.60 [TN-V]
HDD 1tb [CFW] & 640gb [OFW]/ HDD 640gb & OPL v0.92 w/ 1.5tb SMB /Memory 8gb & 32gb