investigation on databases

[booo]

This is really a long term story. Investigate on different database systems and perhaps do some comparison.

Some ideas:
http://www.mongodb.org/display/DOCS/Geospatial+Indexing
https://github.com/couchbase/geocouch
https://github.com/MapQuest/mapquest-osm-server

[booo]

https://wiki.openstreetmap.org/wiki/OSMCouch