... Ahem. So, there's a globe thing coming to the DS now. It's not an instant-weather application or anything, but rather a detailed map of various worldy data. In Earth mode, you can check out specific information for each country, including climate, population and economic details. In History mode, you can touch a region to learn about how it has evolved over time -- evidently dating back to 3100BC.
Finally, the Card mode lets you collect approximately 500 cards which have various puzzles and questions to answer. Obviously, the whole thing is in Japanese, but localization wouldn't be too much of a stretch considering the wealth of "edutainment" titles we see on the DS these days.