If you're looking to add something like the GAdsManager (v2) in your
v3 map, then you'll have to wait for that feature to be released. I'm
guessing it's on the list of things to do but there's no telling when
it will happen. I suggest in the meantime you use regular AdSense
outside the map and when the equivalent to GAdsManager is released for
v3, add it into your map.
-John Coryat
http://maps.huge.info
http://www.usnaviguide.com
http://www.zipmaps.net