Blockbuster's OnDemand debuting for the T-Mobile HTC HD2 smartphone will expand to other platforms, the company said. The service, which lets customers download and watch new release movies in addition to checking store stock, will also be made for certain Android-powered handsets from Motorola, though a timeline has not been revealed. Unlike competitors such as Netflix, Blockbuster's approach will see users permanently download tracks as they're more efficient than live streams.