Let's see if we can compile a list of links to all active chapters websites. So, if you know of websites out there post them here and I will update this list. It could be a master tracking of sorts.
Alpha: 
Miami
Beta: Western Reserve
Gamma: William & Jefferson
Delta: DePauw
Epsilon: Centre College, Transylvania
Zeta: Williams College, Hampden-Sydney
Eta: Harvard, North Carolina
Theta: 
Ohio Wesleyan 
Iota: Hanover
Kappa: Brown University
Lambda: Michigan
Mu: Cumberland
Nu: Union College
Xi: 
Knox 
Omicron: Virginia
Pi: 
Indiana 
Rho: 
Northwestern 
Sigma: 
Stevens 
Tau: 
Wabash 
Upsilon: Boston 
Phi: 
Pennsylvania
Chi: Beloit College, Oglethorpe College
Psi: 
Bethany 
Omega: UC Berkeley, United States Naval Academy
Alpha Alpha: Columbia, (Monmouth College)
Alpha Beta: 
Iowa
Alpha Gamma: 
Wittenberg
Alpha Delta: Westminster
Alpha Epsilon: Iowa Wesleyan
Alpha Zeta: 
Denver
Alpha Eta: 
Denison
Alpha Theta: VMI
Alpha Iota: 
Washington of St. Louis 
Alpha Kappa: Richmond College
Alpha Lambda: College of Wooster
Alpha Mu: Howard College
Alpha Nu: 
Kansas 
Alpha Xi: Randolph-Macon College
Alpha Omicron: Trinity
Alpha Pi: Wisconsin
Alpha Rho: Washington and Lee
Alpha Sigma: Dickinson College
Alpha Tau: 
Nebraska
Alpha Upsilon: 
Penn State
Alpha Phi: 
Virginia Tech
Alpha Chi: 
Johns Hopkins 
Alpha Psi: Butler College
Alpha Omega: Dartmouth
Beta Alpha: Kenyon College
Beta Beta: 
Mississippi 
Beta Gamma: Rutgers
Beta Delta: 
Cornell 
Beta Epsilon: Syracuse
Beta Zeta: St. Lawrence
Beta Eta: 
Maine 
Beta Theta: Colgate
Beta Iota: Amherst
Beta Kappa: Ohio
Beta Lambda: 
Vanderbilt
Beta Mu: Purdue
Beta Nu: Cincinnati
Beta Xi: Tulane
Beta Omicron: 
Texas
Beta Pi: 
Minnesota
Beta Rho: Oregon
Beta Sigma: Bowdoin College
Beta Tau: Colorado
Beta Upsilon: 
MIT
Beta Phi: 
Colorado School of Mines
Beta Chi: 
Lehigh
Beta Psi: 
West Virginia
Beta Omega: 
Washington
Gamma Alpha: 
South Dakota 
Gamma Beta: Utah
Gamma Gamma: 
Idaho
Gamma Delta: Colorado College
Gamma Epsilon: 
Kansas State 
Gamma Zeta: Whitman
Gamma Eta: 
Georgia Tech 
Gamma Theta: 
Washington State
Gamma Iota: Carnegie Mellon
Gamma Kappa: 
North Dakota 
Gamma Lambda: 
Oklahoma State
Gamma Mu: Oregon State
Gamma Nu: 
UCLA
Gamma Xi: 
Florida
Gamma Omicron: 
British Columbia 
Gamma Pi: 
Lawrence 
Gamma Rho: 
Duke
Gamma Sigma: 
Willamette
Gamma Tau: Southern California
Gamma Upsilon: Emory
Gamma Phi: 
Oklahoma 
Gamma Chi: University of the South
Gamma Psi: Michigan State
Gamma Omega: Southern Methodist
Delta Alpha: Western Ontario
Delta Beta: 
Arizona 
Delta Gamma: 
Wichita State
Delta Delta: Bowling Green
Delta Epsilon: Puget Sound
Delta Zeta: Auburn
Delta Eta: 
Kettering 
Delta Theta: 
Alabama 
Delta Iota: 
Ball State
Delta Kappa: 
Tennessee 
Delta Lambda: Florida State
Delta Mu: 
Texas Tech
Delta Nu: 
Clemson
Delta Xi: 
Eastern Kentucky 
Delta Omicron: Weber State
Delta Pi: 
Louisville 
Delta Rho: 
UT-Arlington
Delta Sigma: UC Irvine
Delta Tau: Arizona State
Delta Upsilon: Houston
Delta Phi: 
Wright State
Delta Chi: Western Michigan
Delta Psi: 
Baylor 
Delta Omega: Maryland
Epsilon Alpha: 
East Carolina 
Epsilon Beta: San Diego State
Epsilon Gamma: 
Central Michigan
Epsilon Delta: Cal Poly
Epsilon Epsilon: 
Georgia 
Epsilon Zeta: Guelph
Epsilon Eta: 
Texas A&M 
Epsilon Theta: 
Middle Tennessee 
Epsilon Iota: 
Chico 
Epsilon Kappa: Colorado State
Epsilon Lambda: 
Missouri-Kansas City
Epsilon Mu: George Mason
Epsilon Nu: McGill
Epsilon Xi: 
Bishop's 
Epsilon Omicron: Kentucky
Epsilon Pi: 
Santa Barbara 
Epsilon Rho: Hawaii
Epsilon Sigma: UC Riverside
Epsilon Tau: Toledo
Epsilon Upsilon: Carleton
Epsilon Phi: Tennessee Tech
Epsilon Chi: Rhode Island
Epsilon Psi: 
Binghampton 
Epsilon Omega: Eastern Washington
Zeta Alpha: Lynchburg College
Zeta Beta: 
South Florida 
Zeta Gamma: UC-San Diego
Zeta Delta: Florida Atlantic
Zeta Epsilon: 
Villanova 
Zeta Zeta: 
Wisconsin-Oshkosh
Zeta Eta: 
San Jose
Zeta Theta: Bryant College
Zeta Iota: Utah State
Zeta Kappa: UNLV
Zeta Lambda: 
Furman 
Zeta Mu: 
Nova Southeastern 
Zeta Nu: 
George Washington 
Zeta Xi: 
Truman State 
Zeta Omicron: 
Southern Illinois
Zeta Pi: 
Pepperdine 
Zeta Rho: 
Texas A&M - Corpus Christi
Zeta Sigma: 
West Chester
Zeta Tau: 
St. Louis 
Zeta Upsilon: 
William & Mary
Zeta Phi: 
Missouri 
Zeta Chi: 
Connecticut 
Zeta Psi: 
Central Florida 
Zeta Omega: 
San Diego
Eta Alpha: 
Loyola Marymount 
Theta Delta: Ohio State
Theta Zeta: Toronto
Mu Epsilon: Wesleyan
Sigma Rho: 
Illinois 
Tau Sigma: 
Iowa State 
Phi Alpha: Davidson College
Phi Chi: Yale
Lambda Kappa: Case Tech
Lambda Kappa Beta: 
Case Western Reserve broken
Lambda Rho: Chicago
Temple of the Skull: Georgia
Wreath: Centenary College
Florida International:
Florida International
John Carroll: 
John Carroll