Trading for other currencies than the dollar is not new, and there is nothing strange or scary here. But there are nuances:
1. International prices are fixed in dollars. So "acceptance of other currencies" will be a simple conversion of the DOLLAR, at a given RATE, into a new currency.
2. No one will accept currencies that are either artificially held or have no real backing of the real economy and technology. For example, such currencies include the ruble. But the Indian rupee is quite suitable for an alternative deal. The economy is large, the rupee is provided by the real sectors of the economy and not by the delirium of an elderly crazy under-furrer
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3. In addition, such currencies must be highly liquid, must not only be accepted by the currency issuing country, not be subject to noticeable inflation, or be in an area of turbulence, such as the yuan.