TWRoO on 31 December 2008
I am also sad enough to have a spreadsheet, but it hasn't been updated since July.
However roughly:
Mario Kart Wii: 300 hours
Endless Ocean: 90 hours (a further 30h were in the last week of 2007 as I got it for Christmas)
Battalion Wars 2: 60-70 hours
No More Heroes: 40-50 hours
Zack & Wiki: 40 hours
Metroid Prime: 30-40 hours
Super Mario Galaxy: 20 hours
SSX Blur: 15-20 hours
Wii Sports: 10-15 hours
--------------------------------
Wiiware-
Toki Tori: 15 hours
Lost Winds: 5-6 hours
Also bought GameCube game Eternal Darkness which spent about 30 hours in my Wii.
