although it is widely spread that it is recommendable to have only ps3key plugged in during the boot process, mine works ok with many usb devices plugged in simultaneously.
- usb0 (usb port nearest to the ps3 corner): 1TB seagate external hdd.
- usb1: cheap generic 7 port usb hub; i have connected to it: ps3key, guitar hero 5 guitar dongle, dj hero dongle, and sometimes an 8GB thumbdrive.
ps3 boots in jb mode succesfully every time.
PS3 Slim 500GB (bought right after JB was announced)
DIY PSGROOPIC, PS3Key, JailBreak clone