http://gigaom.com/2013/08/05/bitcoin-exchange-mt-gox-reveals-technical-upgrades-to-boost-performance/When it comes to buying and selling bitcoins, Tokyo-based Mt.Gox is still the biggest player. Even though it may have contributed to to April’s great Bitcoin crash, and other exchanges such as Bitstamp may be snapping at its heels, more than half of all trades by volume still take place through Mt.Gox – so it comes as good news for the burgeoning crypto-currency that the service is working hard to make itself more stable and reliable.