This is a pretty big loss to Yahoo. Steve's an amazing engineer and he led the performance team at Yahoo. He just released an excellent book on performance as w

This is a pretty big loss to Yahoo. Steve's an amazing engineer and he led the performance team at Yahoo. He just released an excellent book on performance as well. He invented a ton of techniques on how to optimize the front and back-end performance of web apps. His team also created YSlow and they're actively supporting/working on Firebug. Yahoo has released so much useful stuff and Steve and his team have been extremely generous. I hope this continues as he moves to Google.