Wii in both first and third party lineup. It's finally coming to fruitation. Sin and Punishment 2 alone puts the Wii above and beyond the HD consoles, and Punchout is way up on my anticipation list also.
Coming in second would be PS3 because of Heavy Rain. I personally don't believe GOW3 will come out in 2009 so I'm not counting it, but I'm anticipating that also. Killzone 2 I will want only when it does not bomb in reviews and not a moment sooner.
360 really doesn't have much first party I'm interested in for next year. Maybe Alan Wake but I need to learn more before I start giving a shit. I didn't like Max Payne at all.