I came across a cool tool from Google. It lets you specify what sites you want to search, then indexes it for you. If you have a igoogle home page set up, you can include it as a gadget as well.
I set one up that searches PBX In a Flash, NerdVittles, and FreePBX.
This limits my search to just those sites.
You can make your own custom search by starting here:
I’ve found it very helpful already - and it’s just been one day