Our site is exactly 12 months old, has a PR4, 10,000+ backlinks in Yahoo, and still very much in the Google Sandbox. I have heard of other sites getting out of the sandbox in a resonable amount of time via the SEO forums, but am wondering if gambling related sites are given more scrutiny by Google, meaning that the filters you have to trip are more difficult than they are for other industries. Just a theory, but I fully expect another 6-12 months in the sandbox, of course I could just be jaded about that.