VeeshanVault

I have a pet project that tracks users' IP Addresses, and I'd like to make an administration page that links directly to an IP Geolocation service. Something where it'll take the IP Address as input on the url. Anyone know of a good, reasonably accurate, free one?

Pretty sure I've used this: http://www.maxmind.com/app/linux

for country data for free, region and city data by subscription..