This may not be new, but I haven't seen it before. In GMaps v2, there
was an integrated "GoogleBar" or (for the Search API fans) the Local
Search Control. But thus far, to my knowledge, it has not been
completely ported to GMaps v3, at least partially because the
LocalSearch object in the Search API has not been updated to support a
v3 Map object as an argument for its .setCenterPoint method. So I
wrote a new wrapper for the Search API's RESTful endpoint which will
support a v3 Map and wrote a custom control which approximates the
essential functionality of the GMaps v2 GoogleBar. I've created a
Google Code project so that others can contribute and posted the code
that I have thus far. In the source repository, you will find a simple
demo page (index.html), unobfuscated code (jGoogleBarV3.js), and a
minified version of the JS that has been run through the Closure
compiler. I hope it helps someone! I would love feedback and/or
contributors!
http://code.google.com/p/gmaps-api-v3-googlebar