My whitepaper on How to Build a Hyper-V Cluster Using the Microsoft iSCSI Software Target v3.3 proved to be popular, getting over 500 downloads, thanks to many of you linking, retweeting, and so on.
At the time, a TechNet page stated that MPIO would not be supported with iSCSI initiators that were members of a failover cluster. I quoted that page, and I excluded MPIO from the setup. This revelation disappointed a lot of people.
Hans Vredevoort (clustering MVP) contacted some of the storage folks in Microsoft to discuss the MPIO/cluster member initiators issue. It turns out that the Microsoft page in question was incorrect. It used to be true, but the v3.3 Software Target does support iSCSI initiators that are members of a cluster. The document has been updated with this note, but I have not added configuration steps for MPIO.