I searched the site and coulnd't find any post on this already so I'm curious if any one else has done research on this. I read this article http://www.wolf-howl.com/google/ftc-gives-me-my-first-search-in-site-box/ and started to wonder how it is done. What I have noticed is that all government sites seem to have it. For example search IRS and you can search IRS.gov inside the search result itself. At first I thought since Google has a government search function already that was the link but I saw it a few hours later when I searched Radio blog. But if you search blog radio, the same result is number but the search is not there. Any one have some insight to this (to me) new feature.
It is for LARGE websites that have proper internal linking and way to many sitelinks to display in results.
Already discussed this on my blog at: Search within a Site aka Teleporting. Google new site search feature. I hope this will help !
Posted somewhere on the forum already.... saw this a couple days ago but wasn't motivated enough to blog about it.
i've noticed a pretty cool traffic trend change due to the new search box about 30% of the people searching for MYDOMAIN typed something in there and searched my site rather than just clicking through to my site these are the people that search for my site instead of going to the actual address. I'll know in a few days whether or not the search box helped convince those same people to buy stuff