I missed out on King of Sword's last free-instrument-of-death deal, but apparently the promo is very legit and the prizes are all nicely pointy. It's also fairly simple: just create a blog post about the promo (such as the one you're reading right now), shoot them an email and voila: you'll be shanking Highlanders and suspicious-looking hobos in no time flat.
Here's the fine print stuff: KingofSwords.com offers unique handmade swords, video game swords, anime swords, and movie replicas, as well as other fantasy related collectibles. So if you've ever wanted to pretend to save Aeris from Sephiroth so the two of you can get married on a mountaintop somewhere, these guys can help. With the first part, anyway. Also, please use your free dagger on yourself.
Anyway, clicking on any of the above links takes you to their main page. From there, just click on the third promo banner for the full details. Happy stabbing!