Yup, the ideas been brought up quite a bit, but we couldnt never figure out exactly what that app should do. Would it be a recruiting tool? An easy way for new members to register/join a clan? A clan roster management tool? Condensed forums? Etc/etc/etc... tons of ideas, but little consensus as to what we should move forward with.
Some folks over in XGC went so-far as to start building an App, but I have yet to hear anything about it since they got started a few months back. If there was more support for it here in the forums, and we could all settle on a few (feasible) options, it may stand a better chance of getting done.