The exploit was recognized and explained by the creator. I trust the protocol. If you don't then you should sell and close up shop.
First, it's not about you or I trusting the protocol. It's about the people all over the world who might want to buy some Bitcoins trusting the protocol. Once something is has shown to be vulnerable, it's kind of difficult to regain that trust.
Satoshi designed Bitcoin to be decentralized. CPUs all around the world contributing to the network security. Having so much of the network hashing power in one place just isn't healthy.
When deepbit was DDOSed recently it took the network 50 minutes to solve 2 blocks. Ignoring any >50% attack, that simply isn't a healthy network.
There is no reason we should be reactive to a possible problem, when we can be proactive and prevent it from being possible in the first place.
If you people want to play with fire and tempt fate, so be it. It may never bite you in the ass, but if it does, kiss all this "free money" goodbye.