Any specific requirements, Hank..?
I think the key is 'Integration with MS Enterprise Library 2005/2006 CAB (New)'.... The Enterprise Library provides Entity Caching out of the box - didn't have time to look at the whole website, but perhaps they are utilising the standard features of Ent Library. The .NetTiers architecture enables Entity Tracking - so you get one instance between requests... as for an Object Querying language, Ill wait for Linq for Entities....