There may be another possible option for hedron.
We offer our own Windows AoE initiator called miniSAN. It was designed specifically for our own line of AoE hardware targets and RAID equipment. There are some exceptions but very often, one may find that it is altogether faster, easier and more affordable to use purpose built AoE target hardware instead of trying to roll/build your own vblade system. This is especially the case if one undertakes the job to build and support several vblade boxes with identical firmware, operating system levels and configurations. Then, with a sizable vblade project there may be other issues later on with electrical and cooling costs.
I should also point out that the hardware targets are accessible via the AoE module Linux initiator so we continue to adhere to AoE standards. This helps customers with fears of vendor lock-in scenarios.
I understand from our developers that it is theoretically possible to modify miniSAN to work with vblade. It's not a supported option at this time but if there is some interest in this area then perhaps we can be convinced into developing this as a viable consumer product offering.
Anyway, if you wish to learn more about miniSAN and the AoE hardware targets then please see here:
http://www.tangiblestorage.com/
Thanks.