Wii will be getting extra colours as soon as Nintendo can get supply to match demand, which I'm assuming will be 2009
Wii price drop seems unlikely
Wii Sports resort will probably be the 2nd best selling game of 2009 (behind Wii Sports)
Wii should get Spore in '09. If the other consoles get it it will be in '10
Firmware upgrades - Support for playing games off SD cards, more interaction with the DSi