Ok here it goes. I am constantly talking with companies who have EDI with a VAN like Sterling or whatever. A lot of companies are looking to move away from VAN's, if their customers allow the flexibility, because a VAN constantly has costs involved. EDI Int is the way to go. You get the same functionality of EDI but it is done all through the web. You dont have a 3rd party company that does all the EDI for you and updates you in batch form. EDI Int is done with software the resides on your systems and allows you to directly communicate with your trading partners or your customer's VANs while eliminating the costs of using a VAN yourself.
My company offers EDI Int that is integrated with your backend applications. PM me if you have questions or want to talk.