The homebrew_mini2 board is now a shared project at Osh Park. You can build your own HB_mini2 by ordering the board, here.
The parts list is as follows:
z1/z2/z3 TVS diode 12vwm 250vc 0402 F2862CT-ND
CONN USB MICRO B RECPT SMT R/A 609-4613-1-ND
C7 CAP TANT 10UF 10V 20% 0603 718-1673-1-ND
CONN IC SOCKET 24 POS DIP 30AU A35058-ND
F1 PTC RESETTABLE 6V, .500A SMD 0805 F2772CT-ND
Y1 CRYSTAL 25MHZ 18PF SMD 535-9128-1-ND
IC1 IC REG LDO 5V .8A 8SOIC MC33269D-5.0GOS- ND
IC2 IC REG LDO 3.3V 0.5A TSOT23-5 576-1910-1-ND
ICU IC MCU 32BIT 1MB FLASH 64LQFP 497-11767-ND
SWITCH TACTILE SPST-NO 0.05A 12V SW1104CT- ND
7 x C 100n 0402
3 x C 2u2 0402
2 x C 18 pF 0402
1 x C 1 uF 0402
2 x R 40K 0402
2 x R 22R 0402