awesome. so that means... well, a lot of things actually. for those who couldn't buy the absolutely fantastic game Warhawk, you can just ask your friend who bought it, to lend you his account to play whenever he's not using it, or just to try and see how it plays before you go out to buy it on PSN or disc version.
For my part, i already bought Warhawk on disc. I don't have an international credit card, and Sony doesn't offer paypal payment yet, so that sucks big time!!
anyways, this new move by Sony is definitely a good reason to promote Warhawk via account sharing. It makes no sense to lock it on the same console. If videos and pictures and disc games are available to all accounts on the same console, it makes no sense locking PSN games to only one account.