Andy Budd is one of the founding partners at User Experience Design Consultancy, Clearleft. As an interaction design and usability specialist, Andy is a regular speaker at international conferences like Web Directions, An Event Apart, and SXSW. Andy curates dConstruct, one of the U.K.'s most popular design conferences. He's also responsible for UX London, the U.K.'s first dedicated usability, information architecture, and user experience design event. Andy was an early champion of web standards in the U.K. and has developed an intimate understanding of the CSS specifications and cross-browser support. As an active member of the community, Andy has helped judge several international design awards and currently sits on the advisory board for .NET magazine. Andy is also the driving force behind Silverbackapp, a low-cost usability testing tool for the Mac. Andy is an avid Twitter user and occasionally blogs at andybudd.com. Never happier than when he's diving in some remote tropicalatoll, Andy is a qualified PADI dive instructor and retired shark wrangler.Emil Björklund is the Technical Director at digital design consultancy inUse, where he’s usually busy building websites—or helping clients and co-workers better their craft. Emil created his first HTML page on Geocities in 1997, but got confused by the mess of table tags. Coming back to the web in 2001, he found this magical thing called CSS and has been fascinated by it ever since. For the last decade, Emil has been building websites professionally, hacking on anything from client-side JavaScript to server-side Python, but always with a special place in his heart for good old HTML and CSS. Emil’s writing and advice on CSS has been published in Net Magazine and on CSS Tricks. He also writes about (mostly) web-related stuff on his blog at thatemil.