I don't believe the 802.3at (Power over Ethernet plus) will have anything to do with SAN switches but I could be wrong.
A little history for those who don't know what the 802.3at standard is:
The current 802.3af became standard in 2003 that supplies 12.95W of power for devices such as VoIP phones and wireless access points.
The 802.3at increases this power level to a minimum of 30W for powered devices such as video cameras and is not out of the IEEE committee yet.
Sorry my response doesn't answer your question directly but I'm curious how it would be used in a SAN setting.
Gary
