* Register a Nintendo DSi, complete a quick survey, and link your Nintendo DSi to your Club Nintendo account to earn 160 Coins (wireless broadband internet connection required).
Easy enough.
* Register a Wii or Nintendo DS game and complete a quick survey.
Wii games = 50 Coins
Nintendo DS games = 30 Coins
Wii Shop Channel games/Wii Channels/DSiWare = 10 Coins (Only eligible for Post Play Surveys. See our FAQ for more information.)
Oddly enough, it doesn't mention the Post-play surveys for Wii/DS titles...
* Indicate your intent to buy a game and you'll earn 10 extra Coins after you buy it, register it and complete the survey.
They mention no time limit between the launch of the game and when you have to buy it. I could have sworn there was one... ?
* Register a Nintendo game and complete a quick survey within 4 weeks of its launch and earn an additional 10 Coins!
I really think you just have to register the game within 4 weeks from launch and do the survey at your convenience... I purchased the following games at launch recently:
New Play Control! Donkey Kong Jungle Beat 5/12/2009
Personal Trainer: Walking 5/27/2009
The Legendary Starfy 6/10/2009
I did Intend to Buy on all three titles. I registered them immediately. I waited until 7/1 to do all surveys that popped up (Registration surveys for all three and the post-play survey for DK:JB).
For DK:JB, I received 50+10+10+10 coins. For PT:W, I've received 30+10+10 and for Starfy, I've received 30+10+10. Starfy is the only title that I actually bought at launch, registered in the 4-week launch period *and* did the registration survey in the 4-week launch period. But I got the 10-coin bonus on all three titles.