If you do a lot of searching, watch out for iSeek from Ambrosia. Here is a thread on it over at MacNN:
While I am not sure I need this, what is nice is that it is always live, and you can leave the search area in the menu bar. This seems useful for people with screens of 1280 pixels or wider.
Take a gander. What do you think?
BTW, am sure the movie on the first entry was taken with Snapz Pro X