I haven’t been able to dabble with midlet’s lately, but here are some applications you can use on your J2ME compatible phone:
Active Viewer (VNC Viewer) – 1.5.7 (yeah, VNC on your *phone*, wow!)
Remote JukeBox – 0.9.6 — control an MP3 jukebox on your PC from your phone
Jablet — a J2ME client for IMing via Jabber.
fun for the whole family.