I guess I'm double posting, but since I'm updating... this thread deserves a bump! Aaaaanyway,
the May PS+ goodies for the US have been, apparently, revealed on a recent Blogcast. I didn't check out the podcast myself, but it's been confirmed that these are the may goodies:
-Sleeping Dogs (PS3) on May 7th
-Knytt Underground (Crossbuy)
-Pinball Arcade (Cross Buy) – Free tables are Arabian Nights, Ripley’s Believe it or Not, Theater of Magic, Black Hole
-BlazBlue: Continuum Shift Extend (PS Vita)
So I must say that May is a pretty solid month for US PS+, in my opinion! I don't really care about Pinball Arcade, but Knytt Underground and BlazBlue CSEX are excellent for me. Sleeping Dogs is a great addition for the PS3 but I don't have a PS3 and I own the game on the 360 anyway! But of course, I'm sure a lot of people appreciate that game being a PS+ freebie. Other than that, I am really happy with Knytt Underground and BBCSEX. I had been considering buying both of these games, but I hadn't done so. I already own BBCSEX on the 360 and I rarely play it since I refuse to pay for Gold. I love fighting games and I had been itching for a fighter on Vita, though, so definitely happy with it (lots of single-player content and now I can play online!).
Source: http://blog.eu.playstation.com/2013/04/17/playstation-plus-your-may-update/