Konami ought to do more online games. Or more online versions of their old games.
Arcade Contra on XBox Live Arcade is a good start, I think I heard it has online co-op. If not, it should.
Expand that to other Contras, throw in Gradius, and then maybe go a bit further with the old Teenage Mutant Ninja Turtles arcade games, and I think there will be much fun to be had.
Might be neat for DS or PSP, too.