Marley Coffee has a great offer for a free sample of their delicious coffee. Just sign up at their page at http://www.marleycoffee.com/checkout/contests/CoffeeSamplePromo.aspx. On their page they said that you have to wait about 1 to 2 weeks and they'll notify you when the have more free coffee samples.
I've read some good reviews of their coffee so this is definitely worth trying. Interestingly enough, this coffee company was started by Bob Marley's son, Rohan Marley. This offer is only available only to permanent residents of the 48 Contiguous United States (lower 48 states) or the District of Columbia and you must be 18 years of age or older.