One thing to note with the JP Cave stuff, the LE releases are all region locked. It's only the standard and Platinum/Best editions of Espgaluda II, Mushihimesama Futari, and Muchi Muchi Pork/Pink Sweets that are region-free. Kills me that Ketsui wasn't one of those unlocked titles, though. Stuff like that makes me really wish that developers and publishers had put their backing into the PS3 instead of 360... that, and my PS3 arcade stick is better than the one I have for 360.
Sadly, Under Defeat HD is about the only shmup on PS3 that received a retail release in NA. I don't think there are even all that many in Japan o.O
Oh, and you can also add Qubed to the list. It has Every Extend Extra Extreme, Rez HD (worth the price alone!), and Lumines Live! on disc.