I'm going to be participating in Compete.com's new Search Analytics Beta Platform which was just announced today.
You can use Compete Search Analytics to Discover new keywords to bid on, find gaps in competitor's search strategies, invest in terms driving the most engaged visitors and track performance against competitors and peers.
I would think this solution involves inserting a Javascript tag on a site that's going to be monitored, and if so, that would be different than what Compete.com does for the rest of it's Web Analytics, which does not require tagging.
But I'll know more soon, as I get the details from Compete.com
