Monday 18th november imo
check out the multiple threads on the subject in this section
ie; beyond silkroad, bitcoin foundation, coin validation etc.
Historically, attempts at regulating bitcoin (and indeed other commodities, etc) in the past have actually led to significant price increases, not the other way round. The more the US gov acknowledges that is actually a real thing, actually worthy of regulation, the more attractive it becomes to less technical minded, conservative investors.
Can you provide examples?
Any past attention from regulating bodies towards Bitcoin has with great majority resulted into expression of interest in the technology by regulators and intermittant let go and watch until further investigations would be conducted in other instances Bitcoin has actually been given official recognition by being regarded as money, currency or a taxable good. Thus, there was no real regulation so far only legitimacy boosts and public attention to the topic. This is positive for price.
If there were to be concrete regulations to be layed upon Bitcoin it might hamper price appreciation because it would add some dose of reality to the best possible outlook for the currency users were allowed to hope for and assume so far.