Is Ripple an anti central exchange that makes Bitpay and Mt.gox almost obsolete? I just learned of Ripple and it still seems a bit fuzzy to grasp the concept, but from what I gathered so far its a decentralized exchange that basically has the potential to overtake Bitpay and Mt.gox. I read that there are Gateway points that do the currency conversions from bitcoin to fiat. Now the other question I have is how does Ripple derive the bitcoin exchange price if everyone starts abandoning traditional exchanges that kind of dictate the price exchanges from fiat to btc. Obviously not everyone is going to abandon those exchanges anytime soon.
Ripple supports a distributed currency exchange; anyone can offer to exchange from one currency to another. These offers are taken when a counter offer the same or better is made.

Like any exchange between two parties, the price would be based on supply and demand, world events, what the market will bear, etc.

The advantage is there’s no single point of failure that would cripple the market. We’ve seen what happens to bitcoin when Mt. Gox goes down or is under a denial of service attack. That’s obviously not a problem with decentralized exchanges.

And with the new Bitcoin Bridge feature of Ripple, you can pay anyone in Bitcoin from a Ripple wallet. The currency exchange is done by an organization (a.k.a a gateway I believe) running the freely available Bitcoin Bridge protocol, like Bitstamp. You can see as of this moment, the Bitstamp rate is $98 per Bitcoin. You can see the exchange rates of the exchanges at Bitcoin Average.