On the countries page ( http://www.geonames.org/countries/ ) there are two countries with the FIPS code FI - I assume that the Aland Islands should really be AI.
Very nice set of data by the way.
Mike Robinson
PS I had a lot of trouble registering to on to the geonames forum - the picture containing the "mystery text" is quite easy to read but it's case sensitive which meant 8 attempts before I managed to get my text accepted. Wouldn't it be just as secure but easier to use by people if it was case insensitive?