Like all Next Gen N-Gage devices it's a Symbian S60 3rd Edition phone, so it's compatible with S60 3rd Edition software and games, as well as N-Gage games.
Like a few previous S60 models, the N82 contains an accelerometer which will (iPhone-style) automatically adjust the screen to the way you're holding the phone. This could possibly be used in games too, so that it would put games into landscape mode when you hold it horizontally, and portrait mode when you hold it vertically.
Another feature worth noting is the built-in GPS receiver, which uses the Nokia Maps service, or can be used with a third party navigation application if you prefer.
Here are some useful links to find out more about the N82:
All About Symbian's coverage of the official announcement
Official N82 Site at Nokia.com
Official N82 Technical Site at Forum Nokia

