Useful Advertising Newsletters

eNewsletters:
Advertising Age - http://adage.com/emailprefs
Bannerblog - http://www.bannerblog.com.au/subscribe.php
Brand Republic - http://www.brandrepublic.com/News/Bulletins/
ClickZ - http://www.clickz.com/showPage.html?page=subscribe
Convergence Conversation - http://www.convergenceconversation.com/register
eMarketer - https://www.emarketer.com/Newsletter.aspx
iMedia - http://www.imediaconnection.com/news/index.asp
MAD - http://www.mad.co.uk/Logon/Logon.aspx?
MarketingVox - http://www.marketingvox.com/
MediaPost - http://www.mediapost.com/publications/
NewMediaAge - http://www.nma.co.uk/Register/Options.aspx

Organisations:
Internet Advertising Bureau (IAB) - http://www.iabuk.net/en/1/newsletter.html
Chartered Institute of Marketing (CIM) - http://www.cim.co.uk/home.aspx
Association of Online Publishers (AOP) - http://www.ukaop.org.uk/cgi-bin/go.pl/newsletters/register.html
Digital Strategy Consulting - http://www.digitalstrategyconsulting.com/digitalbriefings/
Institute of Direct Marketers (IDM) - http://www.theidm.com/
Intellect UK - http://www.intellectuk.org/
Institute of Practitioners in Advertising (IPA) - http://www.ipa.co.uk/
IDG Connect - http://www.idgconnect.com/

People:
Seth Godin - http://www.sethgodin.com/
Marc Bresseel - http://www.marcbresseel.com/
Sharon Jaffe - http://sharonjaffe.typepad.com/jaffeblend/
Dean Donaldson - http://www.deandonaldson.com/

Sharon’s also compiled a list: Useful Sites for Media Insights
http://sharonjaffe.typepad.com/jaffeblend/2008/09/useful-digital.html

And the AOP has a really useful list of Industry sites:
http://www.ukaop.org.uk/Links/52