State-of-the-art meets the state-of-practice...Practitioners meet Researchers...Software Engineering meets Programming Languages...At OOPSLA 2009 we will: Seed Clouds, Scale and Mash, be Reliable and Agile.We will enjoy co-located events: WikiSym, Mini-PLoP, Dynamic Language Symposium, and Onward!Listen to some of the greatest voices in our industry: Barbara Liskov, Jeannette Wing, Gerard Holzman