This keyboard costs around $40-$65 and according to TechReviews it's a pretty great peripheral for gaming, normal usage and Windows Media Center.

"Today, we're reviewing the final of three wireless keyboards from Koribo. The Vivar features an optical trackball, a scroll wheel, 13 multi-media buttons, mouse buttons, a non-skid surface/rubber pads and low battery indication. Let's take a closer look at the Vivar to see how well it performs compared with its two siblings."



Link: Tech-Reviews.co.uk