Also, anyone know about whether it is officially legal to run a bitcoin dice site like JD or PD or CrowdDice.com? If that's not really legal of course anyone would stay away from registration.
If you're from the US you're out of luck and can only do it anonymously. Some countries on the other hand have explicit laws stating bitcoins are neither money or a financial instrument (or have no bitcoin-related laws whatsoever), which means gambling with bitcoins is the same as gambling with monopoly money or potatoes. In other words, legal (for now).
No I'm not from US. I heard that people can register a limited company in another jurisdiction thus evade this legal issue, is that true?
It's possible to register in some countries like Malta.