Yes, you do need to take it to a repair shop to be looked at and I wouldn't even try to turn it on until it was completely dried out.

Having said that, with all the electronics in cameras nowadays, it is generally more cost effective to forgo the repair and buy a newer camera (or if you really like that one, perhaps check out http://www.keh.com for a used one). After all, that model is close to three years old now (which can be dramatic in camera time).