Bookmark this link. No, seriously. You know that feeling of "I'm sure there's an web app that does this", or the "what was the name of that web 2.0 service I've heard about?"... Well, Simple Spark is a simple idea that simply aims to fix that moments for you. It's quite easy: you just go there, search for something and get as a result a list of web 2.0 applications on that field. For example a search for wine gives 17 results, and theird apps catalog now surpasses the 3000 apps.