I recently put together a small PHP script to easily handle storing Google's JSON geo-coded data in couchdb. I think this is a nice fit, obviously because couchdb's native storage format is JSON.
Here's the download location if anyone's interested: http://geocouch.googlecode.com/files/geocouch.php Also, here's a quick and dirty usage tutorial: http://britg.com/2008/08/15/using-couchdb-for-storing-google-geocoded-json-data/
