Another security measure -
A lot of our marketing will be done on bitcointalk. Users receiving promos like NO DEPOSIT BONUS' etc, all will be awarded only through the forum. Therefor, users will have to have a bitcointalk account with activity, and open their ultimatebit account using the same account username as bitcointalk, to receive the bonus' - this isn't to say that cheaters cant circumvent this, but it does lower the chances when you have a 6 month old account with activity on bitcointalk. You can check user activity quite easily. This will help for indicating certain player qualities.
We will be able to validate bonus' based on bitcointalk activity and trust score.
Concentrating on bitcointalk community as a main pool of potential players sounds very smart in the sense of preventing some kinds of collusion, fraud etc. At the same time it will need a lot of marketing work to fill the tables, especially in local subforums. So if you'll need the translations of promomaterials etc for russian subforum just let me know (russian is my native language).