Playlists are serverside. The playlist files of the server are shown on the radio screen. This is not going to change anytime soon.

Use Wiremod to the toolgun to use you own URLs on other servers.

i just figured out that you can use online radio stations directly as input source, thats awesome

maybe there is a way to play back playlists using expression 2 ?

PS:
why are playlists only serverside ? all they contain are links and those could be entered manually too

You can use Wiremod (and so E2) to build your own playlist thing.

It's a serverside only playlist, because it would take to long for me to script a clientside playlist support into the radio.

The radio addon is primary made for playback of radio stations and less for individual songs. That's why it's called '3D Stream Radio'. :)

ok but still its the only addon i know that can play individual songs too