Opening offices in the EU may not be a good idea. Any info. about the legal status of Bitcoin in the Netherlands? According to Bitlegal, it is "permissive".
Bitcoin is classed as asset/property by the Dutch government. It is taxed as such. Though the capital gains tax in the Netherlands is much simpler than the headache-inducing nightmare that is US capital gains tax. The Dutch tax department simply assumes that an annual gain on capital of 4% is achieved and taxes, 30%, are levied accordingly, which basically means that each year, a Dutch citizen pays 1.2% of the capital he had at the start of the previous year (above a certain threshold). People that stick their funds into bank accounts with crappy interest rates get the short end of the stick, people that make good returns on their investments pay relatively low taxes.
In the same statement that classified Bitcoin an asset / property, the Dutch government explicitly stated that it does not consider Bitcoin a currency and as such it is not subject to laws dealing with currency-transactions and that it does not fall under the authority of the AFM (Autoriteit Financiele Markten or Financial Markets Authority, the Dutch equivalent of FinCEN and SEC combined).