below are the one's i'm aware of- and its likely missing SEVERAL, even aside from those in the high school ranks. also some may be out of date.
FWIW this also includes guys that coached for but didn't play for NU. I marked the guys (that i know of) that actually played with a *.
NFL
Gene Huey, Indianapolis, RBs
*Tom Rathman, Detroit, RBs (at least as of 2005)
*Monte Kiffin, Tampa Bay, Defensive Coordinator
*Eric Stokes, Seattle, Scout (ok, not a coach, but still)
*Dave Redding, San Diego, Strength & Conditioning
UIF
*Tony Veland, Omaha Beef, Defensive Coordinator
*Damon Benning, ", RBs & WRs
*Jeff Long, Evansville BlueCats, DL
NCAA
Buffalo Bulls: *Turner Gill (HC); *Jimmy Williams (intern); Angus McClure (OL); Aaron Stramn (DL); Brian Mohnsen (intern)
Ohio: *Solich, *Jimmy Burrow (DC); Tim Albin (OC); Carl Pelini (DL); *Gerry Gdowski (QBs)
Southeast Missouri: Tony Samual (HC); *Kenny Wilhite (CBs); Chris Norris (RBs)
Norris graduated from NU but I can only assume that he played.
Wayne State: Dan McLaughlin (HC); *Clint Brown (DC)
Doane College: *Frazier (HC); *Troy Dumas (LBs)
Concordia: *Mark Mauer (HC); *Russell Gary (secondary); *Rodney Lewis (DBs)
North Dakota State: Craig Bohl (HC); Nelson Barnes (DL); *Tracey Wistrom (grad asst)
*Steve Standard, Colorado State, DC
Marvin Sanders, North Carolina, DC
Kevin Steele, FSU, LBs
Jon Jost, FSU, Strength & Conditioning
Bo Pelini, LSU, DC
George Darlington, La-Tech
*Alvarez, Wisconsin, HC (obviously retired from that position last year)
*Ryan Held, SW Oklahoma State, HC
*Mike Grant, Iowa State, WRs
*Barney Cotton, Iowa State, OC
Jeff Jamrog, Minnesota State-Mankato (DivII), HC
*Mickey Joseph, had been RB coach at Central Oklahoma in 2004. not sure where he is now.
Scott Downing, Northern Colorado, HC
*Dave Gillespie, North Iowa Area CC, HC
*Chad Stanley, Panhandle State
*Ed Stewart, Missouri, Asst Athletic Director
High School
*Brian Boerboom, Great Bridge (VA), HC
*Doug Colman, Absegami (NJ), HC
*Clinton Childs, Omaha North, RBs
*Andy Means, Millard South, HC
*Jason Peter, Huntington Beach (CA), as of 2005
*Jerry Dunlap, Napa High (CA), HC
*Clint Finley, Granado (TX), DC (just hired this year)
Neil Smith is an owner for an Arena League team. He had been a coaching intern a couple years ago (for the Broncos i think?)
Others, retired, and currently unknown:
Zaven Yaralian, retired from the Broncos in 2001
Joe Blahak, Marc Munford, and Mark Traynowicz had been with the Lincoln Capitols up to 2003.
Jerry Murtaugh was coaching for the Omaha Beef until a couple years ago i think.
Joel Makovicka was an intern with U of Virginia in 2004
Rich Glover was working with Tony Samuel at New Mexico State until that (Husker-heavy) staff was let go.
Even before Turner, U of Buffalo had Clayton Carlin as DB coach.