Found this on GoNintendo:
Probably esp useful for DS owners or NTSC/US Wii owners (like me) - though the deal is not restricted to Ninty owners. Since I'm a lazy sod, I'm ripping the text from GoNintendo's site (though I've added in GBP prices for some games based on today's approx exchange rate). If this deal benefits you then great, if not, then move along.
Buy Two Games, Get a Third Free
For a limited time, if you guy 3 games in the list below, you will get the lowest priced game free.
Offer good while supplies last. Eligible product must be sold and shipped by Amazon.com. All items must be added to cart. Shipping and taxes may apply. Amazon.com reserves the right to terminate or modify this promotion at any time. *See full terms and conditions below."
Call of Duty: Black Ops for $39.54(Save 21%, Free SHIPPING Included)
Disney Guilty Party for $29.99(Save 25%, FREE SHIPPING Included)
EA Sports Active 2 for $48.99(Save 51%, FREE Shipping Included)
EA Sports Active NFL Training Camp for $48.99(Save 51%, Free SHIPPING Included)
Kirby's Epic Yarn for $39.54(Save 21%, FREE Shipping Included)
Wii Sports Resort for $36.96(Save 26%, FREE Shipping Included)
Mario Kart Wii with Wii Wheel for $39.99(Save 20%, Free SHIPPING Included)
Metroid: Other M for $19.99(Save 60%, Free Standard Shipping Included)
New Super Mario Bros. Wii for $39.96(Save 20%, FREE Shipping Included)
Pokemon SoulSilver Version for $29.99 (£18.71) (Save 25%, FREE SHIPPING Included)
Reload: Target Down for $14.99(Save 25%, Free Standard Shipping)
Resident Evil 4 for $10.41(Save 48%, eligible for FREE Super Saver Shipping on orders over $25)
Super Scribblenauts for $19.96 (£12.47) (Save 33%, eligible for FREE Super Saver Shipping on orders over $25)
The Legend of Zelda: Spirit Tracks for $29.96 (£18.73) (Save 25%, Free SHIPPING Included)
Ghost Trick for $27.99 (£17.51)
Professor Layton and the Unwound Future for £29.99 (£18.73)