So the worst-kept secret in the consumer electronics industry right now is that TiVo is on the verge of releasing the CableCARD-sportin', HD-recordin' Series 3 box -- but no one seems to know exactly when you'll be able to buy one. We heard from Todd the Best Buy employee that the new machines will be in stock on the 17th of this month, and now our friend Dave over at ZatzNotFunny has spotted the highly-anticipated DMR (remember, they're not DVRs anymore, and TiVo won't sell you one if you use that terminology) on Circuit City's website showing an October availability. Now does that mean October 1st? The 15th? The 31st? Well if we knew, we'd tell ya, but at least now we seem to have an actual release window: the Series 3 will (probably) be available sometime between September 17th and October 31st. As usual, we'll keep you posted as more information comes to light, but if that's not good enough, you're always welcome to switch over to satellite and pick up on of DirecTV's new HR20-700 HD DVRs -- thanks to HDBeat, we know that Best Buy will ship you one of those post haste.