Never mind. I started a project of my own.
I have created a flash (swf) application that can connect to any DAAP-server publically available. If you put it on your own server you can stream your music using its flash interface.
It is still in alpha phase, but if there is any interest I can share the swf-file for feedback. I would really like if someone took a beat at the visual appearance of this, it would be nice if it looked nice. As of now its even worse than the horrible java-client.
It starts a download of the mp3-stream and begins playback as soon as enough information is downloaded. When downloaded, inbetween songs, the net activity is zero.