After beta release and success, Google released today the 1.0 version of Desktop Search. According to the Google Press Release on Desktop 1.0 The new Desktop is greatly enhanced from the original version. It will search the entire text of a pdf document, meta information from images, video and music, support for Firefox, Netscrape Browser, Thunderbird etc. It has the ability to search your visited web pages and even many deleted documents (the text with cached snapshots).
Parents might like Desktops ability to search instant messages. However be forwarned, it takes up 500 megabytes of space. You can find out more and get a copy at http://desktop.google.com.