Developers ask each other: "What stack are you using?" The USA is coming out of recession, in many cases Enterprises have not spent on innovative new software for years. Green shoots in the economy has proactive managements starting to look at new technologies for increases in productivity. Innovations such as Hadoop, MapReduce, Lucene, MVC, ExtJS, and Comet have been applied to Search and Social Applications. Comparatively few innovations have crossed back over to the commercial business space. We will have an experienced panel talk about the choices they will recommend for a Web App Stack and why these choices make sense for the problems to be solved. We will encourage robust debate and audience questions to get a good understanding