Today only, newegg.com offers the Rosewill RKV-2U 2 Port Slim Palmtop USB KVM Switch for $14.99 with free shipping.

The TruLink 4-Port VGA and USB 2.0/PS/2 KVM with Audio by Cables To Go enables a user to control up to four computers with a single keyboard, mouse, monitor, and speaker set. For added convenience, this KVM switch works with both USB and PS/2 mice and keyboards. The TruLink USB 2.0/PS2 KVM Switch also features a 3-port USB 2.0 hub, so any of the four connected computers can share USB devices. The added audio feature lets users enjoy audio from each of the connected computers as well, including listening to the audio from one computer while working on files from ...

Buy.com offers the Belkin Flip KVM Switch with Remote, model no.  F1DF102U, for $30.99 - $10 mail-in rebate cuts it to $20.99 with free shipping.

Rebate Expires July 12, 2008

The 2-Port USB KVM Switch lets you manage two PC??™s with just one set of keyboard, monitor, and mouse. Switch between two PC??™s with a simple press of a button! Separate sets of KVM cables are included with the KVM Switch, so users can start controlling 2 PC??™s instantly. The KVM cables also provide power to the KVM Switch, eliminating the need for a power adapter. Hot Key operations provide immediate access to features such as computer switching, and auto-scanning. With its Hot-Plug, and Audible Feedback, the 2-Port USB KVM Switch is the perfect choice for managing multiple PC??™s. Package Contents TK-207K Multi-Language User??™s Guide 2 sets of USB KVM Cables ...