I don't see what's so useful on IP2Country.
You could use it to see how many people from a particular country have a specific file, you could see where the servers are located and many more...
I know - it's not a must have but it's nice, could be optional.
Besides I wanted to get your attention to eMule mods which are more advanced than the ordinary eMule. Apart from eyecandys they have many useful features - ie. Safehash, .part.met backups, multisorting of downloads' columns, fullwindow view of queue/downloads/clients..., webcache...