Are you desperately in need of a Mixbook account? We sent out the first 50 invites today, and we'll be sending out more over the next couple of days and weeks until launch. If you want a Mixbook account, put a comment on this post, and we'll send you an invite! P.S. Stay tuned for information about our "Make a Mixbook, Get a Mixbook" promotion - beta users get free printed books!