Nice read and interesting thread...
I think third parties should go one way: quit multiplatform, and make unique and original games for each console, using the best of each system possibilities...
This strategy may seem a bit risky, but i think it's the best way for their games to stand out and trully shine...
Of course, we all know it will never be the case with most sports games, and games like Guitar Hero, or the future hit Spore... but in the case of adventure/action, rpg's, platformers, i think that's the way to go...
A last point: if some third parties begin to think that way, Wii will be the easiest and less risky choice, due to lower costs and large userbase... 360 will indeed come second, due to the PC-like development... PS3 would (once again) suffer...
"A beautiful drawing in 480i will stay beautiful forever...
and an ugly drawing in 1080p will stay ugly forever..."