By Tom Foremski - SiliconValleyWatcher.com

As I was researching a story on Google through Google's search engine, I popped in the stock ticker GOOG and guess what turned up on the side sponsored link? An advert for a $2.2m home in Menlo Park, right in GOOG's neighborhood. And the name of the realtor company? Cashin Company Realtors.

Very clever, I thought, what an excellent way to target those newly paper-rich Googlers who are checking on the GOOG share price through Google. But what surprised me even more was that there was only ONE sponsored link for GOOG.

Does this mean that Cashin outbid everyone for the adword link? Or does it mean that only one local realtor knows how to run a Google ad campaign? It's probably the latter.

Which means there is way more room for Google to grow as people become familiar with running a Google online ad words campaign.