The MB supports IPMI, but needs a Supermicro Add-on Card AOC-SIMLP-3+ - remote management adapter to fit the SIMLP IPMI slot.
If you received yours already, did they come with this add-on card to support ipmi?
Looks like the units do come with the card for IPMI.
Has anyone received one yet?
How accurate is the listing?
Looks like the listing was 100% accurate. Pictures showed 3 PSU's, 3 MV8's, ect, ect.
On a side note it looks like the shipping BIOS on the super micro does not boot from anything but SATA or CD. I didn't have time tonight to update the BIOS. But was able to confirm that out of the box my units would not boot a newly imaged UNRAID flash drive.(I am positive it was correct, booted my custom built norco build no problem.)
Am I correct in guessing these are the power supplies for the servers? Mine server should be in shortly. From the photos it looks like the servers can actually take 4 power supplies. 
http://www.ebay.com/itm/Ablecom-PWS-702A-1R-Redundant-Module-Switching-Power-Supply-/170784849038?pt=US_Server_Power_Supplies&hash=item27c391fc8e
I can confirm that these are not the power supplies for these servers, at least mine. The rear pins that connect are entirely different.
The only thing I was disappointed by was that the units came with no HDD screws, thought I read another user got plenty, maybe he requested them when he spoke with the seller.