We accept donations from different countries around the world. We would like to be able to push people who make it to our US-based donations page to the correct donation page for their location, in a completely transparent, non-obtrusive way. We realize we can do that client-side using external servers, but that's an extra look-up that can slow down pages; having that process loaded in the system with a cached database for lookups would keep the load time down for the end user. We also realize that we could use HTML5 geolocation, but that would force the 99% of donors who actually are in the correct place to verity that they're in the correct place; we don't want to place that burden on anyone.