What is strange is that is not the correct MSB classification (at least not since FinCEN "clarification" in March). FinCEN has deemed that exchangers of virtual currency are money transmitters*, also an MSB but code 409.
http://www.fincen.gov/financial_institutions/msb/definitions/msbKey.htmlMaybe Forbes just got it wrong.
* For the record I think this is trying to put a square peg into a round hole and FinCEN should have done it properly by going to Congress getting Congressional approval for creating a new class of MSB related to virtual currency exchange with regs that actually deal with virtual currencies instead of trying to use an existing unrelated classification (with a host of regs which are either nonsensical or pointless when applied to virtual currencies) but that is water under the bridge at this point.