Fresh off the press from Major Nelson himself:

Blacksite Demo 2
Price: Free
Availability: Not available in India
Dash Text: [ESRB: T (Teen) BLOOD,LANGUAGE,VIOLENCE] Battle against a strange insurgency through the streets and backyards of a small American town crawling with alien life.
Size: 988.11 MB

MX vs. ATV Untamed Demo
Price: Free
Availability: Not available in Hong Kong, India, Japan, Singapore or Taiwan
Dash Text: [ESRB: E (Everyone) MILD VIOLENCE] The best selling offroad franchise returns! Own the offroad with the official gameplay demo for MX vs. ATV: Untamed!
Size: 911.78 MB

College Hoops 2K8 Demo
Price: Free
Availability: Canada and United States
Dash Text: [ESRB: E (Everyone)] College Hoops 2K8, the #1 selling and #1 rated college basketball videogame franchise, is back for its third season on the Xbox 360. This exclusive demo features Ohio State and UNC. Download now!
Size: 725.78 MB

Enjoy, and…

Boom!