I would buy a one year old port.... if the game in question were actually good. A one year old port of MGS4 would probably sell quite well on the 360. And the port of Oblivion to PS3 has done decently on a limited install base. You know Capcom is utterly incompetent when they chose to port Lost Planet instead of Dead Rising over to the PS3. Neither game has received stellar reviews, but one is actually unique and has some charm and has developed a strong following, and the other is just another shooter.
My Top 5:
Shadow of the Colossus, Metal Gear Solid 3, Shenmue, Skies of Arcadia, Chrono Trigger
My 2 nex-gen systems: PS3 
and Wii 
Prediction Aug '08: We see the PSP2 released fall '09. Graphically, it's basically the same as the current system. UMD drive ditched and replaced by 4-8gb on board flash memory. Other upgrades: 2nd analog nub, touchscreen, blutooth, motion sensor. Design: Flip-style or slider. Size: Think Iphone. Cost: $199. Will be profitable on day 1.
