Converting XML Polygons into Google Maps

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I have a XML (KMZ) file with polygons that refer to geographical areas, like counties and states, and I want to be able to read this data into googlemaps.I'm thinking it can be done more conveniently for me in 2 ways:a) Parsing the xml file into inserts into a Oracle Databaseb) Reading the xml directly from my google maps page using Javascript. (Data would be placed in arrays, I presume).Either way, does anyone have some tips on how to do this efficiently?Maybe someone made a great part of the code needed to do this already.Thanks