Currently, SiteCatalyst looks for the properly formatted "q=" when the referrer is "*.google.*". We started seeing query strings added to the maps.google.* referrers. They are using the "q=" to designate what Google Places link the user potentially was looking at. They are using a "dq=" to designate the query that the user typed in. We are seeing urls for our keywords when the referrer is maps.google.com. This is not very helpful. I would think you need to update your lookup table that has the known search engines along with their query parameters.