Sega's Valkryia Chronicles is slated for an August 31st release and is planned for a simultaneous retail and PSN release.
Valkyria Chronicles is a real-time turn-based shooter adventure that originally debut on the PlayStation 3. Sega surprised fans by revealing that the sequel would on the PSP instead.
The game is already released in Japan and was confirmed for a western release last year. Unfortunately, there isn't any word on a European release.