Steve Souders
works at Google on web performance and open source initiatives. Steve is the creator of YSlow, the performance analysis extension to Firebug with more than 1 million downloads. He serves as co-chair of Velocity, the web performance and operations conference sponsored by O'Reilly.
John Allspaw
is currently Operations Engineering Manager at Flickr, the popular photo site. He has had extensive experience working with growing web sites since 1999. These include online news magazines (Salon.com, InfoWorld.com, Macworld.com) and social networking sites that experienced extreme growth (Friendster and Flickr).
Estelle Weyl
is a consulting web developer and writes for Community MX. She speaks about web development on occasion, and has a full time job as Senior Web Developer for a small start-up. She's been coding CSS, XHTML, JavaScript and PHP since 1999, table-less CSS since 2003.
Stoyan Stefanov
is a Yahoo! web developer, Zend Certified Engineer, and an author, contributor, and tech reviewer of various O'Reilly books.
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