Hi,
The following write-up sums up the insights gained so far by my team
on this wonderful yet demanding technology:
Garcia M., Prithiviraj R.
Rethinking the Architecture of O/R Mapping for EMF in terms of LINQ
Eclipse Modeling Symposium at Eclipse Summit Europe 2008
http://www.sts.tu-harburg.de/~mi.garcia/pubs/2008/ese/linq4emf.pdf
Comments, pointers to related work, and so on, are welcome.
Miguel