This Router

Newegg has the TRENDnet 4-Port USB KVM Switch Kit with Audio for $39 - $10 off with coupon code “EMCYNYS24” (Expires 2/11) + $9 shipping = $38 shipped. Manage 4 computers with just one set of keyboard, monitor, mouse, and a set of speakers/microphone. The device comes with 4 sets of USB KVM and audio.

Product description from Newegg:

Model Brand TRENDnet Model TK-409K Spec Type D-Sub, USB PC Connectors 4 x USB
4 X VGA/SVGA HDB 15-pin
4 x 3.5mm audio in/out jack
4 x 3.5mm microphone in/out jack Console Connectors 1 x USB Keyboard (Type A)
1 x USB Mouse (Type A)
1 x VGA/SVGA HDB 15-pin
1 x 3.5mm audio in/out jack
1 x 3.5mm microphone in/out jack Computer Connections 4 Ports Monitor Connections 1 Port Video Resolution 2048 x 1536 PC Selection Push Button, Hot-Key Commands or Windows-Based Client Switching Software AutoScan Interval 10 ~ 60 seconds Temperature 0??C to 40??C(32??F to 104??F) Humidity 0% to 90%,Non-Condensing Dimensions 6.6″ x 3.2″ x 1.1″ Weight 6.5 oz. Features Audio Features with Audio USB Features with USB support Features Use one keyboard, monitor, and mouse to control two computers
4-port USB K
VM Switch with 1 set of Microphone/Speaker port
4 sets of!
VGA and
4 sets of Audio & Microphone Cables
Supports Microsoft IntelliMouse, Optical Mouse, Logitech Net Mouse and more
Supports super High Video Quality, up to 2048 x 1536 VGA resolution
Supports Windows 98(SE)/ME/2000/XP/2003 Server, Linux, and Mac OS
Multi-Platform supports for PCs, Macintosh G3/G4, iMac and Mac Mini
Auto-Scan & LED display for PCs monitoring
Hot-Key, push button and Windows-based client switching software
User definable hot-key (Windows Only)
Plug & Play and Hot-Pluggable
USB Interface Power method