Let's see -- what other USB devices do/might/should work?Mass storage - works HID - keyboards work, mice have same troubles as BT mice CD/DVDs - has no drivers Network adapters (Will power be an issue for some of these?)Ethernet - Helpful, but do they work? 802.11b/g - Redundant, probably less range 802.11a,n - Could be helpful, do they work? BT - Redundant, unless you need longer range... Then power draw probably kills you. Serial adapters (including USB interface on HP49G+) - Probably no drivers? Audio (USB speakers) - Not persuaded of utility, but might work. Probably no drivers? Anything else?