Let's post em here with links when we find them. Any announced resignations, firing or will-be-out-at-end-of-seasons will do.
I will keep a master list in this first post. Reply with links/tweets/etc with any that you see.
UPDATE: College positions filled for now! Let's lead with NFL openings and follow with the college master list...
NFL changes
Buffalo Bills: Doug Marrone opted out of his contract on Dec. 31
San Francisco 49ers: Jim Harbaugh hired by Michigan on Dec. 30
Chicago Bears: HC Marc Trestman and GM Phil Emery fired Dec. 29
Atlanta Falcons: HC Mike Smith fired Dec. 29.
New York Jets: HC Rex Ryan and GM John Idzik fired Dec. 29
Oakland Raiders: Still have an interim head coach in Tony Sparano, but NFL.com reports he'll likely be replaced.
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College changes:
Buffalo: Jeff Quinn fired Oct. 3; hired D-III UW-Whitewater's Lance Leipold on Dec. 1.
Colorado State: Jim McElwain hired by Florida Dec. 4; hired fired on Dec. 8; hired Ohio State OC Tom Herman on Dec. 16.
Florida: Will Muschamp fired Nov. 17; Colorado State's Jim McElwain hired Dec. 4.
Kansas: Charlie Weis fired Sept. 29; hired Texas A&M assistant David Beaty on Dec. 8
Michigan: Brady Hoke fired Dec. 2.; hired 49ers coach Jim Harbaugh on Dec. 30.
Nebraska: Bo Pelini fired Nov. 30.; hires Oregon State's Mike Riley on Dec. 4.
Oregon State: Mike Riley hired by Nebraska on Dec. 4; hires Wisconsin's Gary Andersen on Dec. 10
Pittsburgh: Paul Cryst hired by Wisconsin on Dec. 17; hired Michigan State DC Pat Narduzzi on Dec. 26.
SMU: June Jones resigns Sept. 9; hires Clemson OC Chad Morris on Dec. 1.
Troy: Larry Blakeney announced his retirement Oct. 5. Hired Kentucky OC Neal Brown on Nov. 29.
Tulsa: Bill Blankenship fired Dec. 1; hired Baylor OC Philip Montogomery on Dec. 15.
UAB: Shut down entire program Dec. 2; leaving an awesome coach, Bill Clark, to be a hot commodity among coaching positions???
UNLV: Bobby Hauck resigns Nov. 28; hires HS coach Tony Sanchez on Dec. 10.
Wisconsin: Gary Andersen hired by Oregon State on Dec. 10; hired Pitt's Paul Cryst on Dec. 17.
Youngstown State (FCS): Hires former Nebraska coach Bo Pelini. Yay, Bo!