Stephen C. Locke  
   Graph theory and algorithms.
   http://www.math.fau.edu/locke/

Bela Bollobas  
   Functional analysis, combinatorics and graph theory.
   http://www.msci.memphis.edu/faculty/bollobasb.html

Tom Whaley  
   Formal development of programs, Steinhaus graphs, parallel computing.
   http://home.wlu.edu/~whaleyt/

David Eppstein  
   Graph algorithms and computational geometry.
   http://www1.ics.uci.edu/~eppstein/

Ashay Dharwadker  
   Algebra, topology, graph theory and theoretical computer science.
   http://www.geocities.com/dharwadker/profile.html

Gary Chartrand  
   Graph structures, distance in graphs and domination.
   http://www.wmich.edu/math-stat/people/faculty/chartrand/

Keith Edwards  
   Harmonious colourings and achromatic number.
   http://www.maths.dundee.ac.uk/~kedwards/

Dan Archdeacon  
   Topological graph theory, combinatorics, theoretical computer science.
   http://www.emba.uvm.edu/~archdeac/

Hubert de Fraysseix  
   Topological graph theory and combinatorics.
   http://www.ehess.fr/centres/cams/person/hf/index.html

Rich Lundgren  
   Applied graph theory and combinatorial matrix theory.
   http://www-math.cudenver.edu/~rlundgre/

David Penman  
   Random graphs, computational combinatorics.
   http://www.essex.ac.uk/maths/staff/penman/

Erdos Number Project  
   List of people with Erdos number at most 2.
   http://www.oakland.edu/enp/

Erich Prisner  
   Graph theory, algorithms, computational geometry and cellular automata.
   http://www.math.uni-hamburg.de/spag/gd/mitarbeiter/prisner/prisner.html

Gordon Royle  
   Algebraic graph theory.
   http://www.csse.uwa.edu.au/~gordon/