We currently have a fully developed web forms application, basically its like WordPress using .net for multiple users to publish content. It does more than that but thats the simplest way to describe it. Our "webmasters" (I work in the gov) want everything put inside of SharePoint. We currently have SharePoint 2007. I have no experience developing within SharePoint so I don't know much about it.
My question is how do you decide when to develop your application in SharePoint and when to develop outside of it.