I just got an email from the fabulous Guy Phillipson at the IAB which had a side bar that looked like this:

You'd have to be a woolly mammoth buried under ten feet of ice for the past 10,000 years NOT to have heard of Twitter, Facebook, LinkedIn or YouTube!
But for every few people who have acknowledged their importance to marketing, there’s always one who appears to throw up slightly in their mouths at the thought of sending customers from a newsletter to the channels they’ve set up on these sites, because they’re worried they’ll see a dip in traffic or engagement on their own property.
Who cares?
People with control issues, or those that just don’t get it, that's who!
If millions and millions of your potential customers, readers, audience or whatever are on those sites then why not go where they are and they feel comfortable?
Sure, there are rules of engagement, but for goodness sake we’re operating in a fast-moving, ever-changing and dynamic (I think they all mean the same thing?) environment so get with the program.
There’s been a change in the way business is done and social media is now firmly part of the media mix.
Ditch page views and unique users and think about your ROI – Return On Inaction!
Think of the data! Look what people are saying about the IAB even now!
Failure to embrace these channels and to keep morphing as new channels start emerging simply isn’t an option.