Nokia World is going to be held in Nokia’s home country Finland for the first time in the show's history. It will take place on September 25-26 in Helsinki.
The interest for the show is expected to be tremendous, so you should probably follow the news closely if you want a spot. You can get more information right here.
This will be probably the most interesting Nokia World to date. There is a lot going on inside Nokia – Meltemi, PureView, perhaps a tablet? This is also close to the expected Windows Phone Apollo release, so new powerful Lumia phones are expected as well.