Sony just announced at E3 that Playstation Network users now have the ability to rent and puchase moves and TV shows through the network. It's not just Sony content, either: Fox, MGM, Lions Gate, Warner, Disney, Paramount, Turner, and something called Funimation are signed up from the get-go. Video will be available in both SD and HD, and pricing starts at $1.99.
PSN users will also get a single persistent sign-on across every device that can access the network: PS3, PSP, PC. It's not clear whether those aliases will carry over into games themselves or if friends lists will start working across devices as well, however. The integration is scheduled to happen for this fall, though, so you might want to go and grab your handle of choice relatively soon.
http://www.engadget.com/2008/07/15/playstation-network-gets-single-sign-on-across-devices/