A very sweet little half hour video about the history of shmups...
In French but there's a subtitle file for download just down from the main video..
Well worth half an hour of your evenings time imho
http://shmup.canalblog.com/
There's a nice big chunk in the middle all about Cave, which left me a very happy little
Grand Master Turing once dreamed that he was a machine. When he awoke he exclaimed:
"I don't know whether I am Turing dreaming that I am a machine, or a machine dreaming that I am Turing!''
Sadly we'd never see anything like that here. The French do have a large and long history with games/Japanese importing hence why it probably would be something of interest there.