The Escapist is handing out 15 day trials over at their website. There are a few rules, but if you've got some friends who aren't willing to shell out some cash for FE but are willing to give it a trial head on over.
http://www.escapistmagazine.com/contests/register/fallenearthtrialkey
The Rules
# You must first be a member of The Escapist or WarCry. To get your free account with The Escapist, sign up here.
# Next, log into your Escapist account below using your username and password.
# You will then be asked for your email and to check the appropriate boxes to receive your free Fallen Earth trial account.
# You must be at least 18 years old to participate.
# Have fun!
# We will be giving keys out until they are gone, so tell your friends and get some quality online gaming in.
# After you get your key feel free to join the Fallen Earth User Group so you can plan to meet up in-game with other members of The Escapist.