I've found everything you've shared (thank you!)  

Perhaps I'm just too early......  is it wrong to plan ahead, let the employees know (myself included) what their salaried take-home pay will be?   sigh....

To quote the suburbancomputer.com page:
 Note: These are preliminary rates based on the IRS Notice 1036 dated December 2011 and are subject to change. 
The offical rates have yet to be published as of 01/04/2012 4:30PM