It’s not ready quite yet, but your Sky+ app has just received an update that’ll make it possible to select and download on-demand content before you even get home.
An accompanying update will need to be sent to your Sky+HD box soon, but when that happens you’ll also be able to browse the On Demand content and get it downloaded to your Sky box before you even step off the bus. It also means that you won’t have to suffer the slow evening bandwidth that many ISP’s tend to have.