This community home page prominently displays the various modes of interaction available to its users: Forums, Knowledge base, Ideas, a Contest, and a Blog. Within the Forums, you can also see the Twitter integration feature in action!
The community home page displays some components (or widgets) that summarize items like latest the posts and knowledge base articles, top kudo'ed authors in the community, a community-level tag cloud and more. There's also a "Getting Started" component that provides links into items to help you use this community most effectively. In the upper right, there's also a community browser that lets you navigate the community more like a site map.