I love the Da Vinci Institute suggestions. Libraries are about accessing information and producing new information products. They are also about communicating information effectively and creatively, so I would add presentation and performance space and space for telecommunication collaborations and broadcasts. Room has to be flexible for changing types of information tasks, which definitely include group work. It is hard to DRAW a library these days. Sure, "library" remains energetic, physical space--but my bounded picture would spew out little post-it notes all over our learning community.