Not really--I just googled "viking," downloaded a couple of images that were easy to edit or cool looking, then used photoshop to manipulate them. It's better to do lettering in Adobe Illustrator, but like I said, I wanted to get it done quickly.
I've done graphics for advertisements on Yahoo before for games, so it's really nothing new for me. I don't do it as a profession, but I taught myself the basics when I was trying to get a record label started back in the day...