My current game addiction, EveOnline, has a holiday special running right now: 60 free trials. Normally you can get 2-3 weeks depending if you solo or go through a buddy, so if you want to check out Eve, now is a good time.
Access is via a special code, one per account I believe. I have two accounts left, so e-mail me at kevin@kevinsthoughts.com if you would like one of my remaining codes.
Kevin