Artists Network

www.criticalnetwork.co.uk
A continuously updated database of information on artists practice, groups, organisations, forthcoming events, interventions, exhibitions, publications, call for submissions, etc.
This will have a specific focus on activity in the UK and Ireland, concentrating on critical and contextual art, events and discussion.
There is an oppourtunity to subscribe to receive weekly emails, however I have found that it doesn't seem to work very well, so it's probably best just to check it every so often.