http://www.englishbiz.co.uk/#A-level – basics of analysis – good revision.
http://www.mediaknowall.com/alevel.html - comprehensive!
http://www.mediamagazine.org.uk/ - simply invaluable to all A-Level students.
http://longroadmedia.blogspot.com/ - great school – great blogs!
http://www.hurtwood-house.co.uk/creative/media.html - similar to above!