Here's a plugin template that simply launches a web browser tab with the search terms tacked onto the URL provided in the script. Requires some modification for your favorite site. Cool to add for sites where you don't feel like writing a plugin, but you do want to see search results on the site directly.
Modification instructions included in the file. Download, edit, and install.
http://pastebin.com/download.php?i=GH6mtRiN