Links I have found useful

Mathematicians

Tim Gowers
Tapani Hyttinen
Meeri Kesälä
David Marker
Pirita Paajanen
Thomas Scanlon
Harold Simmons
Alex Wilkie
Boris Zilber

Logic Research Groups

Mathematical logic around the world
Leeds logic group
Manchester logic group
Manchester MFG - Mathematical Foundations of CS Group
Oxford logic group
UEA logic group
Victoria University of Wellington

Organisations

AMS - American Mathematical Society
ASL - Association for Symbolic Logic
BLC - British Logic Colloquium
EPSRC - The UK Engineering and Physical Sciences Research Council
EWDM - Electronic World Directory of Mathematicians
IMU - International Mathematical Union
LMS - London Mathematical Society
MODNET - Model Theory network
RAAG - Real Algebraic and Analytic Geometry network

Miscellaneous websites

Google
Google Scholar (beta)
The ArXiv
Mathematical Genealogy Project
History of mathematics archive, including biographies of mathematicians

Last updated 18 January 2012. Please email me if you have any comments: jonathan.kirby _at_ uea.ac.uk