Kensington has released the Wireless Presentation Remote. It is really an average USB wireless remote that can click through your slides about TPS reports with ease. It does have one thing going for it—range. The remote will work up to 65 feet away, which could be really useful in the awkwardly laid out auditoriums. It is available for $45 or so.
Kensington Wireless Presentation Remote [ubergizmo]