As you are thinking about the *purpose* of your site, it is easy for such considerations to narrow the scope of a project rather than first engage the rich possibilities. For that reason, I would encourage you all to read the first chapter of Martin Weller's The Digital Scholar: How Technology is Changing Scholarly Practice. Weller, a well-known author on the role of technology in emerging scholarship, seeks to create awe and wonder with the potential in the digital milieu while understanding the specificity of academic scholarship. The entire book is a pleasure.
Also, here's a brief video of Dr. Weller discussing the importance of the digital in academic scholarship today.