This is a truly lazy post, just a reposting of an interesting idea I saw on CreditBloggers which I read regularly through my Google reader.
Apparently, Capital One has a build-your-own credit card. See http://www.creditbloggers.com/2008/01/capital-one-say.html
So in addition to having rampaging Vikings in their TeeVee ads, they have a really pretty hook-y idea for getting folks to sign up for a new credit card. Deviously clever!