Why not?
We are also looking at 'interfacing' Windchill (as ready-only of course) with other systems - not just ERP.
Even reporting - being 'pressured' into purchasing Cognos (at extra cost of course!) when we could simply use our existing Crystal Reports if we knew Windchill table structures.
I too would like to know more about ESI - is it another option that comes at a cost?
We have Windchill 10.1 M030 by the way.