http://www.starwindsoftware.com/starwind-free
I know quite a few Hexites have home storage devices based aroudn a regular OS ( for example freeNas or OpenFiler )
it looks like the latest version of Starwind might be worth a try for those wanting to have a play aroudn with iSCSI.
It seems to have quite a few features that could really let it compete with the big boys out of the homelab and into the SME market...
Key features:
Data Deduplication: Data Deduplication is a specialized mechanism of data-compression that allows reducing needed storage capacity due to the process of eliminating duplicated datare.
Snapshots & Clones: Capture point-in-time snapshots with unlimited rollback points or make full volume copies
CDP (Continuous Data Protection): CDP provides a replication mechanism to ensure an RPO (Recovery Point Objective) of zero data loss for applications that require a lower RPO than asynchronous replication can provide
Thin Provisioning: Allocate space dynamically for highly efficient disk utilization.
Support for iSCSI Standards: IPSec, CHAP, MPIO are all fully supported in StarWind Free.