I think that could be the very worst thing for govts (from their perspective) to do in response to BitCoin. Firstly, it will lend credibility to the idea and the protocol which will result in boosting BitCoin more because it has the advantage of a head start. Secondly, one of the primary motivations behind this currency is to wrest fiscal control from huge collectivist institutions and give it back to the individual. Thirdly such a move would undermine confidence in paper money. There is no real reason why anyone would use IceCoin or BitDollars or BitPounds because it's just BitCoin without the advantages.