Yep you got it they made a 5 Port USB MegaCaster and it is up for sale now

http://www.vetra.com/845Utext.html

$329.00

and the

Keyboard & Mouse unit

http://www.vetra.com/845Ukmtext.html

$459.00

Standard support for the following:

MegaCast - USB Multicaster / Device Multiplier
USB Keyboards:
All USB compatible keyboards w/o built-in USB Hubs

USB Gaming Keyboards:
Nostromo Speedpad N52
Nostromo Speedpad N52TE

USB Mice:
All USB compatible mice

HID Devices:
Most other USB HID devices will operate through the MegaCast