Bob Dylan must be taking cues from Barack Obama, and is taking his advertising into the web 2.0 world. Designed to drum up interest in his greatest hits album (like he needs to advertise, the album will sell itself!), he’s delved into the viral video format. On his website you can input your own personal message onto the cards he holds up in the classic Subterranean Homesick Blues music video, and send it on to friends via email, who can then view your equally Dylanesque poetry…