It says quite a lot about the amateurism of Bitcoin that the largest (and essentially only real) exchange has such tiny withdrawal limits.  Any business that does more than $1000/day in gross sales has yet another disincentive to try out Bitcoin, since their money will be essentially held hostage by the exchange for fear of crashing the price.  And if another 30% dip in value occurs while you're trying to cash out, well, tough titties.