One thing that CEO Dick Costolo has said is the amount of technical debt we have (http://kara.allthingsd.com/20110117/full-dces-interview-video-twitter-ceo-dick

One thing that CEO Dick Costolo has said is the amount of technical debt we have (http://kara.allthingsd.com/20110117/full-dces-interview-video-twitter-ceo-dick-costolo/ http://kara.allthingsd.com/20110117/full-dces-interview-vide...). The scale is simple tremendous, and you've got to remember: Twitter isn't just a website; it's an SMS service, clients and an API.