I would suggest doing a "hack-a-thon" like Xenland did before going live with any type of site. Much better for us to point out flaws/holes in your system before going live.
A hackathon is actually a pretty retarded idea since nothing guarantees that flaws will be reported instead of being exploited after the launch.
+1. I was about to say that, but chose to show Gumby instead since this thread is retarded.
Well, "retarded" might be a bit strong, I mean that it can be a good idea in *some* cases, but for an exchange it is not.