Do they exist? Here's the situation - I'm running a monitor with 25' long USB and HDMI cables and I'd like to run a bluetooth mouse and keyboard, but its a little far from the computer to use bluetooth reliably. I've been looking at a few options with 2.4G dongles that could plug into the monitor's usb hub, but most of them aren't terribly mac friendly (no command keys, etc) so I'd much rather run a magic keyboard or similar. It would be great if I could plug a bluetooth dongle into the monitor's USB to get a more reliable signal. Everything out there seems to only be windows compatible.