Learner Modelling
LeMoRe (Learner Modelling for Reflection)
USer Modeling Inc.

AI
BCS SGAI
ECCAI
AISB
International AI in Education Society

British Computer Society Specialist Group on AI Conferences
SGAI-xx series : Previous conferences, AI-2007, AI-2008
Forum for AI Research Students 2007, FAIRS’08

Education Conferences
International Conference on Artificial Intelligence in Education
AIED 2007, AIED 2009
International Conference on Intelligent Tutoring Systems
ITS 2006, ITS 2008
International Conference on Computers in Education
ICCE 2008

Chatbots and Conversational Agents
Yhaken
Lingubot
A.L.I.C.E.
Using bots in language learning
BotSpot

Educational and Learning Technologies
Ms Lindquist
e-Learning Centre
Association for Learning Technology
LTDI - Learning Technology Dissemination Initiative
Encyclopedia of Educational Technology

Resources
Google Scholar
CiteSeer
BPS Ethical Guidelines
Email address encoder - helps prevent spam

And a few personal favourites and other sites I maintain...
MyWonderland
Mental Health Online
BBC, especially Radio 4 and the BBC Radio Player
Tiddly Wiki - a fantastic wiki-style online personal non-linear notebook
Wikipedia
John Muir Trust
Walking in Wales
BookCrossing
Freecycle - keep stuff out of landfill