Use liberty reserve - it's the easiest. First run your coins through a tumbler, then mtgox or use another exchange to transfer out to liberty reserve (USD) or Pecunix (gold-backed). Both are anonymous. You can get international Visa, MasterCard, Maestro cards that can be transferred to from pecunix and LR, and just pull the cash out of a debit machine or use the money for whatever. This way the tax parasites don't know it even exists unless they walk into your house and say 'hey............. where'd you get ______'. But of course everything else about you is upstanding and squeaky clean so you wouldn't have a tax parasite in your house, right?