Way back in June, I sat through (and enjoyed) a presentation by David Weinberger at the Enterprise 2.0 Conference in Boston. As a result I put his book, Everything is Miscellaneous on my reading list. Having just finished reading the book, I was pleased to stumble across a video of his presentation.
It is great presentation and book to provoke thought about how you organize your knowledge. If you have a free hour, watch the whole video. If you only have a few minutes, watch the first few minutes.