I think bitcoin will rise to a substantially higher price in the next several years.  I suspect that the majority of this price will be drive by black market demand, though I see non-black market uses for bit coin as well.  I suspect it will be a slow rise in price, but I wouldn't be surprised to see $500/BTC by 2014/2015.  I don't see it being universally adopted for another 10 to 15 years but this could change if easy point of sale bitcoin acceptance starts to propagate.