I was just reading Randy Brown's blog and his latest post is about viral marketing. I was going to come over here and start a new thread about it, but I think it's better off posted in this thread.
Have you seen the new
Jack In The Box viral marketing campaign? Looks to me like they are doing a great job of it. I wonder how much more of this we'll see from big businesses.
(Not an aff link. I'm not affiliated with Randy Brown or GrownUpGeek. I'm just a big fan. 
)