Right now there are no trading fees on Mt.Gox until tomorrow. This probably gave (a) the guys with automated trading bots a field day to tweak their algorithms

Right now there are no trading fees on Mt.Gox until tomorrow. This probably gave (a) the guys with automated trading bots a field day to tweak their algorithms and (b) Mt.Gox a chance to take advantage of this to see if they can handle the increased load in trading. My guess is that there's going to be a last minute scramble to buy before the trading fees get reintroduced probably pushing the price up a bit. When trading fees go in there might be slightly less liquidity, compared to yesterday and today. Entirely speculative on my part, but plausible anyway.