So what if I want to use the service with no PC to hand
This service seems doomed to fail. The clue should be in the name "PlayStation Portable", not "PlayStation Tethered to PC". Where is the PSP client for downloads?
By all means offer a PC client but there needs to be a PSP client so someone in a hotel or coffee shop or anywhere else with wifi can download content. Heck, why force them to wait hours for their content - add streaming. Does that sound unreasonable? Does it make any business sense to deny the impulse purchases that a properly written PSP client would allow?
The prices for movie downloads are also pretty steep. Do they seriously think people are going to pay €4.50 for an 12-18 month old movie at sub DVD quality? The sorts of people who might use this service would have no trouble using P2P to get content for free, or buying / renting & ripping a DVD.
With all that in mind, I really wonder what Sony & Sky are thinking with their prices and the complexity of this service.