Joe Tamargo, also known as Sundaybrew from forums and blogs does have three permanent tattoos with the logos of his favorite websites on his arm. Now that is Viral Marketing. On his blogpost I could find that he own livingadspace.com. This is where you can book adspace on his body.

One of the three website logos that Joe decided to have on his arm, Digital Point. It is one of the most visited webmaster resource website and ne of the best and most active forums. It is an excellent place to buy links, content and get help with the every-day-struggle every webmaster goes through once in a while.
 
The second website logo is from the Jeremy Schoemaker blog. Jeremy is also known as Shoemoney and blogs at Shoemoney.com. He is a SEO and SEM specialist.
 
The third tatto is the nice and clean grownupgeek.com logo. GrownUpGeek understands itself as "Your online family of friends, helpers and Geeks!" I`ve never been on the site and to be honest, it looks way too geeky for me. 
 
All in all I must say, this is a brave way to collect bookmarks and links from blogs and social bookmarking platforms. A great way to get people talk about your website. This is the purest for of starting a good "linkbait". Good Luck Joe!