Future of Local Search on Mac
One of the best things I found to come out of the Apple WWDC keynote preview of the next update of the OS X line, Tiger, Spotlight. Spotlight is the OS file search application. Not only does Spotlight search the file name, file contents (in applications where applicable), but in the metadata. This really is going to be wonderful for me. I, as a user, can set a project name in the metadata and then I can group files from that point. I can also set a term, like "synch" and use AppleScript and Search to batch the files together for synching with mobile devices, easily. Another nice feature is the searches can be saved and stored as a dynamic folder. This provides better control of my Personal InfoCloud.
Steven Johnson provides the history of search in Apple, which has nearly the same technology in Cosmo slated for release in 1996.