Hey, that's SHMUP! Lots of SHMUPs!

What's a SHMUP? You don't need to know but you've certainly already played it. These are the classic shooters. Pure action as it was born. R-Type. Xenon. Tyrian. Ikaruga. All these classics.
If you got some time check the archives and look for the good old SHMUPs (that states for "shoot-em-up" or "Shoot Them Up!" or "shoot'em up"). Recommended sites: www.shmup.com (in French), www.classicgaming.com/shmups/ (in English), www.shmup-dev.com (in English).
Anyone knows about more SHMUP sites?