even now Nokia 5800 is a very famous phone and i think the main reason is it's features and the reasonable price. 5800 is a fullface touchscreen phone like apple iphone. recently Nokia announced the newest version of 5800, that is Nokia 5800 Navigation Edition.
the features are almost similar to the previous phone but Navigation Edition has many new navigation features. also the appearance has bit changed, Nokia 5800 Navigation Edition has chrome outframe which gives very luxury look to the phone.
also it comes with Regional maps and Lifetime pedestrian and vehicle voice-guided navigation licenses as new features. other features are similar to Nokia 5800 XpressMusic.