CIMapper Question

[Jeff Eastman]

I'm wondering how to tease the elephant into accepting any concrete 
instance of the interface o.a.m.clustering.Cluster when writing trained 
clusters in the cleanup() method of CIMapper. I've gotten the MR version 
of the ClusterIterator to get to that point in testing but it blows 
chunks with an IOException when I try to pass a 
o.a.m.clustering.kmeans.Cluster (I will rename the latter for 0.7). 
Seems the MapTask.collect() wants == and not instanceof.

I've talked with Ted about passing Clusters rather than the current 
ClusterObservations but don't see how at this point. Any ideas?