Back to the original poster...
First of all, SBS do thing we'd call "very questionable". Generally speaking LUN numbering starts from 0 (ZERO) and not 1 (ONE) which is EXACTLY their case. So it maybe not so good idea to give hard times to other developers violating SCSI-2 specification. My proud IMHO
Second, we'd be happy to test their code but all my kind requests to join their beta testing team were simply ignored. So we'd got first chance to test them just few days ago when they had created public demo download (I think after they found we do the same

).
If we'd got beta version of SBS stuff we'd fix (OK, workarounded THEIR) problem monthes ago. For now please wait till our next update would be available. Or use our own StarWind iSCSI target instead. I think we can make you an offer you can hardly refuse
Thanks!