Yes, Google has another new tool, the Google deskbar.
The deskbar indexes the entire harddisk, all text in documents, mails, visited websites,… When you then search google.com, it allows you to search your HD as well.
It looks like a nice tool, but I miss the possibility to specify where I want to store the index. Also, visited webpages are only supported when you use IE, no firefox.
In conclusion, I like most of Google’s programs, but I’m going to let this one slide.