I have tentatively implemented it on my
Ireland Photos / Desktop Backgrounds / Irish Wallpaper site
(You can see the search box at the bottom middle of each page).
I am not sure I really like it - but it does add functionality to my site I guess..
It is also a bit of a nuisance that the minimum search results width is 795 pixels - so they don't fit into my standard site template...
I will come back in the near future with some results....