Ouch why no top 10?!! Tough one as I got a lot on my list which I'm planning to buy! Although for 5 and 4 points it's not difficult at all to choose. Mind you that Zelda will release this month in Japan... and of course planning to buy it!
5 - Mario Galaxy (WII)
4 - Zelda Phantom Hourglass (DS) (why the hell no one mentioned this one so far?!)
3 - Dragon Quest Swords (WII)
2 - Treasure Island Z (WII)
1 - Dewy's Adventure (WII)
Since I've already ordered Harvest Moon for the WII, which is very desirable to me I at least don't have to mention that one anymore :D
Most desirable as well Final Fantasy Crystal Chronicles (WII + DS) and Dragon Quest IX but am not sure if they will release in 2007 since SE is planning to make remakes of DQ games first before DQIX will release :( Donkey Kong Jet Race, Nights for instance I WILL buy.