I use tcpmp, it can stream http content.
This is unfortuantely only a hack as it allows no browsing.
Also using flash or java via a browser isnt great as IE mobile doesnt handle password protected webpages well and Opera mobile doesnt do java/flash well as it either doesnt run or uses too much resources for that small PDA.
Indeed I havent yet found a standalone player for WM6 for DAAP or RSP that would allow browsing.