The way I see it, mtgox isn't bitcoin, and if they can't keep their shit secure, another (better) exchange will step up to take that role. I like mtgox, it took a lot of work and initiative to get up and running, but you can't be sloppy when handling your client's money, security is paramount.
Of course mtgox is not bitcoin, but it was the largest exchange (61k customers!) The entire system has been compromised and shown to be susceptible to hacking. Tradehill had to close as well, so people are left holding pieces of digital value they cannot exchange.