This is an Inventor Labs tool but it looks similar to atoolsomeone created for SolidWorks a while back......ahh...can'treemember the name. Anyway, it let you see the parent/childrelationships in a graphical layout. Seemed it was fairly costlythough.

http://labs.autodesk.com/files..._300/256/file_256.pdf
SolidworksGeneral