Dave Sperling's ESL Cafe is a good place for an ESL teacher to look for jobs and advice.
D.E.N. The Digital Educators' Network posts a number of EFL vacancies on its website, along with links to other useful organisations.
EL Publications print the EL Gazette ($70 for 12 issues) and the ELT Guide (cost $19.95). You could email them on 100130.2037@compuserve.com to find out more.
You can email IATEFL at 10070.1327@compuserve.com or visit their website instead.
TESOL Inc. publish a placement bulletin advertising their TESOL Placement Services (cost $21/$31US). Contact them at place@tesol.edu for further details.
The NOVA Group is the largest TEFL organisation in Japan, employing about 2,500 staff.
David Hellam's Homepage - A Guide to Getting an Overseas Teaching Post