I use a Belkin Omniview pro 4 port on an Octane, O2, Indy and Windows 7 pc. All works great. The only issue I had is when I use the older granite PS2 mouse, the mouse looses signal when I flip from one computer to another. My newer dark grey SGI mouse (common on octane 2 / visual workstations) works perfectly when switching - I am wondering if there is a plug n play circuit inside the newer mouse that regains connection if unplugged and plugged back in.
I also noticed that when I switch computers, its best to wiggle the mouse and hit ESC a few times to keep the connection live while switching.

2x600mhz R14000 Octane2 dual head V12 / V10, 7 gig Ram

2x250mhz R10000 2gig ram, MXE, Digital Video, MSCSI, Jaleo

400mhz R12000 O2, 1gig Ram AV1 - 250gig Media' raid

180mhz R5000 Indy XZ 256mb ram

200mhz R4400 Extreme…….Under Construction
Dell T7600 dual 3.5 Xeon, 512 gb ram, Quadro K6000 + Tesla k20 - DaVinci Resolve Studio Editing
Dell T5500 dual 3.2 Xeon, 72gb ram, Quadro 6000 + Tesla C2075 - DaVinci Resolve Studio Cutting
Intel i7-990x 3.46GHz Extreme 6 core / Quadro 5000 & 2 x Tesla C2075 / 24gig Ram inside an SGI 320vw case