Never Let Them See You Blinkx

Has anyone out there tried blinkx? It's supposed to be some kind of free, uber-search application that "automatically and intelligently links to relevant information anywhere and in any format: on the Web, in the news or on the desktop. Utilizing blinkx, users are no longer limited to Boolean keyword search. Instead, blinkx automatically and implicitly conducts searches based on the content being view by each individual user. " I would like to hear some first-hand experiences from folks before I take the plunge and install something that -- while I really like the proposed functionality -- seems kind of ... I don't know ... invasive. (Note: blinkx does state that they don't do anything suspect with the search data.)