I searched "searching" tonight (er, this morning) and figured out how to add site-specific Google search to the forum search option. When you click the Search option in the Navigation Bar at the top of each page, you'll now see an option to Google FamilyWoodworking. This is a MUCH better search method than the one that's built into the vBulletin software.
Note that this option will not be displayed if you are using the "Smart Brown" display style. Use "Woody" or "Default Style" if you want to use the Google Search feature.
Enjoy, and happy searching -