Newsubmitter davek writes with news that the U.S. will be applying money-laundering laws to Bitcoin and other 'virtual currencies.' "The move means that firms that issue or exchange the increasingly popular online cash will now be regulated in a similar manner as traditional money-order providers such as Western Union Co. WU +0.17% They would have new bookkeeping requirements and mandatory reporting for transactions of more than $10,000. Moreover, firms that receive legal tender in exchange for online currencies or anyone conducting a transaction on someone else's behalf would be subject to new scrutiny, said proponents of Internet currencies. 'I think it's inevitable that just like you have U.S. dollars used by thieves and criminals, it's sadly inevitable you will have criminals use a virtual currency. We want to work with authorities,' said Jeff Garzik, a Bitcoin developer. Still, law enforcement, regulators and financial institution have expressed worries about the hard-to-trace attributes of virtual currencies, helping trigger this week's move from the Treasury's Financial Crimes Enforcement Network, or FinCen."