Wifi Remote Play is a simple Qt app I wrote for Symbian [edit: now for Android too], to allow controlling Media Player Classic [edit: and now also VLC] over a wifi connection: http://homepage.ntlworld.com/mark.harman/comp_wifiremoteplay.html
I know - there are other remote control apps out there, but the ones I found for Symbian were either bluetooth only, or I didn't quite like how they worked :)
Application is unsigned. [edit: now properly signed, on the Nokia Store]
I've only tested it on my Nokia 5800 (and this is my first released app), so I hope it works okay on other phones...