One of the many great things about Symbian is themes! Themes lets your phone be “your phone” and lets you change the feel of your Symbian phone at the drop of a hat.
I found a newer site that has lots of themes and little bit of Nokia news on it called Ssyams. While I have no idea what the name means I do know they have some great themes there.
Want to see more themes? You can check all of them out here.