I've made two quite handy Fat Fingers tools:
1) an add-in for Internet Explorer: select a word on any web page and right click to do a Fat Fingers search on eBay. Looks like this in action:
2) a Widget for OS X 10.4: Do a Fat Fingers search from the Widget Desktop. Thanks to Korruptor for helping out with the shiny panels - my ham fisted efforts were crap. I still don't like the Fat Fingers logo I put on it, but it'll do for a 1.0 release ;-)
They can be downloaded over here.
Time for my next idea....