This topic comes up every now and then, and of course I enjoy it because I have some good ones. (Hey, braggin' rights is braggin' rights.)
It seems the Seahawks themselves have taken an interest in the topic. There is a photo gallery on the official site of Seahawk tattoos that fans have submitted here.
There is also a gallery of Seahawk themed motor vehicles here.
It's worth the time to take a look for those who have not yet seen them.