Hill Holiday demonstrates their intellect by allowing the audience to dive directly into their brain trust right from the home page. Instead of the typical marketing buzzwords and slick flash intros, they place their blogging forum right up front.
I think this is fresh and appealing to be able to get right into their heads and past the rhetoric. And especially the ability to contribute dialog with their subject matter, and link to their employees who are behind the thoughts. A great way to communicate who they are in conversation mode instead of the company marketing line.
Not to forget mentioning that Hill Holiday is a great shop too.