I monitor the RSS feed for intel download center updates for the DNS28280FYKH and i this one popped up just a bit ago.
https://downloadcenter.intel.com/Detail_Desc.aspx?ProductID=3782&DwnldID=23716&lang=eng&iid=dc_rss
however when i go to the download center and search for BIOS version for the DN2820FYKH it shows that v0025 is the latest. Has anyone installed the above version (0028)?