Posted this on our blog so that others can refer people to it - it's another "overview" of what Bitcoin is, but formatted as "The First Five Questions" everyone is bound to have. This is particularly useful for any journalists who are starting to research Bitcoin.
This bit confused me, and will probably confuse a newcomer too:
Several million dollars worth are transferred per day, but it is impossible to know for what purpose. In the last 24 hours, about 30,000 transactions occurred, or over one thousand transactions per hour. Since Bitcoins are exchanged back and forth with standard government currencies, the volume of this trading is about $100,000-$500,000 worth per day.
You seem to be giving two contradictory values for the same thing. Is it several million or half a million per day?
Maybe you're saying the half million number is the amount traded on exchanges, whereas the bigger numbers is on the blockchain. If so, the "Since ..." bit could stand clarification. Maybe give the two numbers as "bitcoins transferred" and "bitcoins exchanged for government currencies" per day.