No new games came out in Japan this week, but the Vita still sold nearly 20,000 units. We in the west, at least, get Guacamelee which is a 328MB download for Vita owners. It is getting rave reviews and is only £7.99 for PS+ subs, £9.99 for the rest of you.
There's also the AR mini golf game and it looks, from memory, like International Snooker has had a price cut. Sony was waving around a spring sale, called Declassified, which unfortunately doesn't contain that game or any Vita titles. Keep your eyes out for some news from Sony on that front.