You played this on your Xbox 360 last year, didn't you. Or maybe you didn't after reading Jim's review. I thought it was fun enough. If you've missed it because you're a PS3-only guy, I'd say its worth a go when it hits the PlayStation Network this summer. There's big maps, lots of deaths, six-player online co-op, four-player local co-op and much more for you to dig into when it launches on PSN this summer. Yep, Konami made it official today.
There's also a few bonuses to this PS3 version. The "Beauty, Desire, Situation Dire" Map pack (say that three times fast!) is in the mix, as are downloadable characters Julius Belmont and Yoko Belnades.
"Summer" is the only date information we have so far. I'm sure we'll get a solid date for Castlevania: Harmony of Despair soon.