Yeah Super Laser is pretty fun, I gave it a 4 out of 5 in my
Review Blog that I started for the hell of it. I wish the game was longer, though, I want more... It looks like they have another shooter called iFighter, but I'm not sure if it's older or newer than Super Laser.
Any other good shmups out there? I've heard good things about Espgaluda II but don't think I'm gonna pay $8.99 (holy crap!) for an iPhone shooter. I know R-Type is also available, but that game is brutal enough go at it on Wiiware, let alone with touch controls. Radiant, a Space Invaders / Asteroids hybrid is pretty cool but starts out slow.
EDIT: Actually, come to think of it, Pro Zombie Soccer sort of qualifies as a shooter. That's a quality game too.