The Slingbox PRO is their new flagship model, with additional inputs and outputs so you can control up to four audio or video sources (sadly, if you want to use high-def component inputs you need to drop an extra fifty bucks on a dongle they're calling the HD Connect -- there is no option for HDMI).
ENGADGET: Slingbox PRO, Slingbox AV, and Slingbox Tuner get official