I personally really like the concept of the World Fair, but then again I haven't ever hosted it before so I'm not sure what to say about the "repetitive information" part. XD I didn't really think that it was repetitive, though I guess I could see where it might be: the general facts (e.g. capital, geographical location) would always be the same unless some major event happened right this second. lol Perhaps even the statistics. To reduce the repetition of such facts maybe people could do a comparison report from the previous year(s)? XD I personally find it interesting to see how things (e.g. crime rates, population, economy) change for a country/state in a year. People could always highlight an annual event or holiday? I don't know. XD I'd need to know which countries and/or states are being represented to start throwing out random topic ideas. For example, if I did a section on Croatia, I might try to appeal to our general nerdiness / age range by doing a "Croatian influence on Pop Culture"(?) topic and then use some TV shows, anime, etc. as examples. XD
As for "boring," were you mostly referring to the accompanying forum activities for members to collect world stamps?
EDIT: Oooh! The option for different time periods would be cool, especially if the country or state had been previously represented.