TiVo Series 3 coming September 17th for $799?

It's no secret that TiVo's on the verge of shipping its HD-capable Series 3 set-top-box -- after all, the company's already notified the FCC, posted a product page, and even ignited a flurry of controversy over Time Warner's CableCARD policy -- but we have yet to hear of a solid release date or retail price for this highly-anticipated device. Well HDBeat's got an inside source at one of the big box electronics stores (to protect his identity, we won't say which one, but he goes by the name Todd and wears a blue shirt to work) who claims that the Series 3 has already been added to their system, scheduled to be in stock on September 17th for a hefty-but-not-unreasonable $799. (Side note: if that price stands, props to our boy Dave Zatz for prognosticating it many moons ago). You first heard about this box all the way back at CES, recently spotted it in the wild, and now it may finally be time to withhold next month's rent as well as ring up your cable provider to make sure they have those precious CARDs all stocked up.