Idea for challenge: Your inside out, basically make your version of the islands or your core memories or just what it's like in your head (if only there were llamas )
I'd sign up for almost any giveaway. I agree with other people though about facebook and twitter. Even if I already have a character, I'll sign up and give it to a friend if I win. I've noticed that some giveaways allow people to choose one announced or released figure.