The Russian based online payment service allows users to store their funds in different “purses”. For example WME for Euros and WMG for gold. The new purse, WMX, is denominated in Bitcoin where one WMX = 0.001BTC.
WebMoney has its own exchange to allow users to convert between the supported currencies. This change means that users will be able transfer Bitcoin(WMX) to any of WebMoney’s other denominations.
More details here.