Just to provide a bit of balance to the concerns about proprietary enterprise approaches, here we have a Learning Circuits article by Barbara Ross, Chief Operations Officer for WebCT who is putting the case for the prosecution (or is that the defence?) in Driving Higher Ed Institutions to an Enterprise Approach. Just to balance the balance a little I'll let Stephen Downes' comment sign off.
“Me, I've never seen an enterprise system that I've liked, and while the author touts service and standardized processes, these seem to me to be the major weak points, not the benefits, of an enterprise system.”