Has anyone else found interesting examples of Google Base products feeding into the search results. For example, a search out of the US for "real estate seattle washington" (and amost other real estate terms) shows a set of drop-downs that, in the end, provide results from Google base. You can see an example at http://www.google.com/search?hl=en&safe=off&q=real+estate+seattle+washington&btnG=Search.
No, I have not seen that before. Thanks for pointing it out. You would think a search for events like concerts would work, but I tried several times and didn't see any similar results. Will keep an eye open for other examples.
This has been out for at least a year. You can find houses / apts to buy or rent. It uses the Trulia site database - but you add to it via Google Base or Product Search.