The updated version of the SHOUTcast DSP plug-in has now been released current as a Forums exclusive and is available from:

(Direct download link -> here)

Note: This updated version of the plug-in will only work on Winamp 5.5 and higher and requires Windows 2000 and higher to work (though the plug-in has only been actively tested on Windows XP / Windows 7 / Windows 8). Additionally, this is a 32-bit dll like Winamp though should run fine on a 64-bit version of Windows.