Katamari Damacy is part of next week's PlayStation Store update. So if on April 30 you see a massive ball of clumped-together games where the PSN should be, you'll know what's up.
The game, first released in North America almost ten years ago, will come to PSN as a PS2 Classic. That means it's playable on PS3, but not Vita. If you need a portable fix of rollable crazy, there's always Touch My Katamari.
This is quite possibly one of the quirkiest games to come to the US in some time. You start by rolling a small ball around a city. As time progresses your ball gets larger and larger until you're adding people and even buildings to your efforts.