happened to my a/c compressor but for a different reason.
Read this thread if you haven't already: http://www.peachparts.com/shopforum/showthread.php?threadid=65697
It seized also: would start for a second, then stop. Initially thought it was the clutch but no such luck. Did most of the 'work' myself so that kept the cost down but once it seizes, you need to flush and replace major components.