The US Internal Revenue Service finally announced its guidance for virtual currencies yesterday, explicitly referring to bitcoin (see the announcement here and notice here). The increased clarity – provided three weeks before the end of the US tax year - will come as a relief to many who were scared to get involved in bitcoin, commercially. But what does it mean for different members of the bitcoin community? US businesses wanting to get involved in bitcoin have been waiting for this for a while. As recently as January, US Taxpayer Advocate Nina Olson pressured the IRS in her annual report...