Ficedula has released a new version of SylphAMP - this can be installed on Winamp as an output plug-in and will send the audio to your DS
Heres whats New
-Hopefully improved sync a bit
-Lowered lag between PC/DS
-Less garbage playing when pausing/stopping song
-Display playlist on DS
-Very basic UI
-Support entering any IP as server to connect to
In theory you could connect to your home PC via the internet. In practice I haven't tried this (and until NTL upgrade my broadband next month, I won't have enough upload). You'd need to forward port 9883 from the router to the PC running Winamp; it also needs an absolute minimum of 350Kbit upstream from the PC to the DS to work, preferably a bit more.
Once I implement options on the PC side to downsample the audio either to 22KHz and/or mono, it'll be more usable on lower speed connections.