...with source code

Requirements:
- .NET Framework 2.0 (http://www.microsoft.com/downloads/details.aspx?familyid=0856EACB-4362-4B0D-8EDD-AAB15C5E04F5&displaylang=en)
- You must have the port 32123 UDP opened in your router.

Step by step guide:
1) Install .NET Framework 2.0 (if it's not installed yet)
2) Run the server app (DSAmpServer.exe). If you have Windows Firewall enabled, it will ask you if you want to lock the application. You must choose [b]Unlockb]. It doesn't matter if Winamp isn't opened, because you can open and close it from NDS 
3) Switch on you DS and run DSAmp. It will ask you for host's IP, enter it and click OK.

Enjoy it!

LINK: DSAmp v1.0 - by PadrinatoR 2006

MIRROR : PadrinatoR Games You'll find a DSAmp link in this web site

MIRROR 2 : You'll find a DSAmp link in this web site
Screens

From here by PadrinatoR.
Im using this program now and i think its great. Though i hope for a later release with a possible playlist and the ability to add and edit files. This is great for people who wanna listen to music or watch pRon movies from your bed but lazy to move to the pc to pause/change track/change volume etc. Not to mention its easy to setup and use. Great program!