Xeon Sandybridge E3-1220/1280 not for MacPro?

[zephonic]

So I found these on Intel's site, but I assume these are not the Sandybridge Xeons that everyone is saying will be in the next MacPros? What's the difference?

http://ark.intel.com/MySearch.aspx?s=t&CodeNameText=Sandy Bridge&Sockets=1155

 

[Umbongo]

E3 Xeons are basically for entry level workstations and servers. You will likely see their consumer versions in the new iMacs - Core i5/i7 2000 processors.