PC Review have a new review of the Aten CS62DU KVM, a small inline switch that allows you to use two PCs with one keyboard, mouse and pair of speakers
In this article we're going to take a look at a recently introduced two-way KVM switch, the CS62DU from a company named Aten. A KVM switch enables a user to use two or more computers with one Keyboard, Video Display and Mouse and in this instance, 2.1 Audio and a microphone.Aten CS62DU KVM Review
This model has only recently been introduced and offers DVI & USB2 switching with audio between two computers. As far as I'm aware at time of writing this is the only model currently available at a reasonable price that offers these facilities.