Ewokki on the AAS Forums has pointed me to his MIDP based winamp controlling software for the Nokia Communicators. Winamp Remote controls the MP3 playback application on your PC, while Winamp Remote Search allows you to look through your PC and build playlists and find tracks to load into Winamp's playlist. Still in beta, so you'll need to roll your sleeves up, but it looks to be worth it.
Read on in the full article.