My interest in Chandler-like functionality is what prompted me to finally get a hold of the book (I have a large reference stack related to this stuff, predating the Chandler announcement). One of the most interesting Chandler related observations that they made came during their review of how to build a better document management system (DMS). From observing an attempt to migrate an office into a DMS, they observed that documents fall into three categories, hot, warm, and cold, based on how the documents are used and related to each other (like being stapled together or put in a file folder). Cold documents are a good match for traditional DMS';s. Hot and warm documents (and files) are not. I want Chandler to be very good at supporting hot and warm information.