There are a number of specialized organizations and databases that focus on specific facets like statistics.
TESOL- TESOL's site is the homepage for TESOL teachers
IATEFL - International Association of Teachers of English as a Foreign Language
NCBE - National Clearinghouse for Bilingual Education from the Department of Education
NCESLL - National clearinghouse for ESL Literacy Education
CALICO - Computer Assisted Language Instruction Consortium