http://www.theregister.co.uk/2009/03/30/conficker_signature_discovery/
Direct download of tool: http://iv.cs.uni-bonn.de/uploads/media/scs.zip
While this won't tell you if it's clean or not, but will tell you which hosts are infected.
Direct download of tool: http://iv.cs.uni-bonn.de/uploads/media/scs.zip
While this won't tell you if it's clean or not, but will tell you which hosts are infected.