But you asked if this will be available for DSS "Does DSS now support an HA configuration" and yes it will be this month. In the article it only mentions that DSS will have this feature not iSCSI-R3 Enterprise. iSCSI-R3 can be upgraded to DSS so you are not stuck with only one option this is why you can upgrade your iSCSI-R3 Enterprise to DSS. Yes there is a cost just like Microsoft when you upgrade (but with free support). Additionally Symantec wants to charge us $300 +or- for each latest agent (someone has to pay for this). We are looking to resolve this but need additional time and in the mean time we have announced NDMP as stated in the article that you have supplied.

iSCSI-R3 has manual failover just not the Auto Failover feature and so many customers are upgrading to DSS because of the additional features we are adding and they feel it is worth the price point. iSCSI-R3 will not be discontinued as you say because many customers are satisfied with the price point and the manual failover is sufficient for there needs and they have no problem with this.