John Cow gives an excellent lesson in Viral Marketing
John Cow just started a new contest on his site, to promote the release of a new product called StoreStacker. StoreStacker seems pretty cool. It’s a piece of software that will automatically set up an affiliate store for you, using offers from several different affiliates.
John Cow’s contest is an excellent example of how to get the word out about a new product. Contests are always good for grabbing the interest of your reader base, but Cow takes it one step further, by offering additional incentives for doing various things to promote the product and the contest itself.
You can earn extra tickets by posting on Twitter (which is a great way to get some traffic, just ask my e-referrer) or Pownce, and by voting up their Squidoo page, which had reaching #22 in a very competitive niche (making money online) as I write this.
And, if you haven’t figured it out by now, there are bonuses for writing a blog post about it 
Sorry I’m such a whore.