We tried to think about a way to reward early adopters who sign up now. As a result developers signing up for ShoutMob Beta will receive two things:
1. $20 a credit so they can get started as soon as shoutmob goes public
2. $5 referral credit, so they get rewarded for spreading the word
We hope that early adopters will get enough credits to be able to use ShoutMob for free for a long, long time.