I'm REALLY curious to know your thoughts on Google Instant Search.
http://techcrunch.com/2010/09/08/google-instant-its-search-before-you-type/
I'm really stoked to see this. It's a very intuitive user experience. The fact that search refreshes as you type, to me, means that it's an active state of something that used to be the typical call and response. It will be interesting to see if this pattern starts to permeate into other areas of search, say, in your companies intranet site, or your file structure on your mac.