GeoIP Data 0.01
This is just a helper plugin! You can use it to get Country, Region, City, PostalCode, Latitude, Longitude, MetroCode, AreaCode depending on a given IP address. It should avoid the need to connect to online services for each query.
The file you need for it is quite big: the plugin loads 25MB from www.maxmind.com, unzips it to 100MB and stores two huge tables into your db.
Enabling the plugin just creates the table schemes. All other steps must be done in the settings screen.
It creates a view in the database (vw_GeoIPData) so that you can see how the information can be read out from the database.