This site is being flooded with off-topic questions about building web apps. Unfortunately, these off-topic questions are being upvoted a lot. These are clearly not questions about webmastering, they are questions about web app development, which could go on stackoverflow.com or a site specifically about web app development.
E.g.
http://webmasters.stackexchange.com/questions/1408/good-open-source-engines-to-create-a-jobs-web-app
http://webmasters.stackexchange.com/questions/1366/web-application-design-good-reading-materials
Also, almost all of these questions are sort of vague, unanswerable "what on earth should I do now?" blah blah discussion questions, which I thought was what we were trying to avoid with these stackexchange question and answer sites.
Also there is a proposal languishing in Area 51 about web design. I went to Area 51 to make the proposal but it's already there:
http://area51.stackexchange.com/proposals/5163/web-development-design