we are thinking of buying a Storage device which uses the "Open-E Enterprise iSCSI Storage Module" to create an IP SAN.
My question is, is this likely to work with Microsoft Clustering Services (W2k3 SP1) in the
way a conventional fibre based SAN would to provide a HA solution.
Yes by creating the iSCSI Targets for your quorums. You can test this with our DSS trial version from the link below and provides up to 60 days for testing.