Don’t forget to look at state money transmitting licenses. That’s what killed Goldage. (They were one of the largest e-gold exchangers). They were unlicensed because that thought that digital gold was outside the jurisdiction (not legal tender) of the state/federal governments. The state laws were vague enough, and law enforcement was ignorant enough, that they were prosecuted by the state of New York.
(See: http://en.wikipedia.org/wiki/Goldage)
Lots of people speculate that they were prosecuted for political reasons and not for “legal” ones. The central banks (and therefore the governments under their economic debt rule) do not want competing currencies. This isn’t because it is competition (e-gold was soooo small compared to the FRN paper game). They didn’t want e-gold to open up people’s mind to the idea of alternate currencies. That is a far bigger threat.
Remember that a license is an act of privilege that can be revoked/regulated. I firmly believe that any action that you can purchase a license for is fundamentally lawful. (Ex: you can’t buy a license to commit a crime. No “license to kill”, Bond. Tongue).
It is possible to claim lawful excuse to operate unlicensed. (By pronouncement or claim by right of notary.. again, you need to know what you are doing.)
Peace!