Teaching English to Speakers of Other Languages (TESOL) academic is a knowledge dissemination site which links the work of TESOL-based academics to teachers, teacher-trainers, teacher-trainees, decision-makers and other researchers.
The British National Corpus (BNC) is a 100 million word collection of samples of written and spoken language from a wide range of sources, designed to represent a wide cross-section of current British English, both spoken and written.
EFL blog - various writers and topics, some very interesting, some less so. Quite interesting one on EAP:
English for Academic Purposes - 7 Myths and Realities Edward de Chazal