1. Yes
2. Yes, if you outsource EDI, but GenTran seems to have the best SW.
3. ALLiGACOM Net-Transfer. www.alligacom.com One of the 1st AS2 certified SW providers. They also can act as a VAN.
4. Is it tested and certified. Will my third parties give me flexibility, i.e coms with AS2, VAN, FTP...