This originally from Mike Arlington at Techcrunch, you can see the whole article there .

Interview with Biz Stone experts:

"Has Twitter become more stable following the issues earlier in the month? What has the Twitter team learned from the experience?

Biz Stone: “We’ve worked to isolate various parts of our system to prevent one outage from taking out the entire network. Investigation into the causes of previous bouts of instability have taught us a great deal about our usage patterns and shown us a clearer path towards being prepared for future waves of growth and usage”.

In what way has Twitter’s reliability improved?

Biz Stone: “Our recent efforts towards scalability allow us to stay on our current growth curve, and even increase the rate as we add new ways to send and receive updates such as our recent Facebook application”.

What next in terms of scalability?

Biz Stone: “We’ll continue to isolate different aspects of the system and perform micro-optimizations of heavy-usage areas. We’re currently implementing additional internal tools which will enable us to do more meaningful research of usage patterns. Finally, we are adding more machines”."

Full article here..