Is CableCard 2.0 even an approved specification from CableLabs?
The ability to do ONDemand content from the TiVo Series 3 is dependant on the 2.0 CableCards (which provide for 2 way communications between the box and the cable head end). No cable company is yet providing 2.0 CableCards, so you cannot do ONDemand from the TiVo. The Series 3 has a CC2.0 slot, so when the cards are available the Series 3 will be able to do that. However, it is unlikely that you'll be able to TiVo the shows, only watch them.