Cali 2 NL

For someone that uses the CIA World Factbook regularly, this a pretty neat new way to do it:
http://der-mo.net/WINDS/
The cool part is that the interface allows for various relations, not just borders. Viewing border connections isn’t actually too useful, a normal geographical map which allows you to see the CIA Factbook information would be more handy (like this). Viewing other connections, such as language (which you can do on this map) is what makes this functionality cool.
Other connections would be handy, such as viewing countries with similar population sizes or grouping island/landlocked nations. It’s easy to think of countless more relational “views” that would be really handy.