You can get early access to the Lost Planet 2 demo by visiting and creating an account
HERE then you need to get engaged with the lost planet community site, enter your email and a code will be sent, PS3 demo code will be valid tomorrow and 360 code valid today.
Just a quick note, i am having major trouble loading the lostplanetcommunity site i am guessing it is because of the amount of peeps wanting the code.
Have fun when and if you get it.