I've had my Wii for 1 week and have no problems other than an occasional hang with Wii Play & Sports. I bought Mario Party 8 yesterday and had sporadic hangs playing. I've been playing Mario Paper for over 6 hours and have had zero hangs.
Overall I've been happy with the Wii
I have to believe the problem is within the game code and not the console.
Is anyone else seeing this?
One other item to note is when my wife plays as 2nd player and she waves her remote looking for the cursor it seems to hang.
My game collection:
Wii Sports / freebie hangs on tennis, baseball consistently
Wii Play / Hangs on scarecrow chase and pingpong
Mario Paper / Not a single hang
Mario Party 8 / Seems to hang more often playing with 2 players
SSX Blur / Single hang
Carnival Games / single hang
I expect this issue has been beaten to death but didn't want to scroll through thousands of posts.