I need an web application that is going to use steam data.
Project Detail: I want to use steam trade system through my own site. Users enter this web application by getting api key at http://steamcommunity.com/dev by logging into (using) their steam and this entering process. After they logged in they can open trade announcement by using their items on the steam inventory In return they can add customized items that we decided, to their requested items section.
For an exemplary application site, you can look at: http://bit.ly/11nrqBQ