A few years ago I registered the url Save It For Your Blog (dot com) thinking I would make t-shirts of the phrase and get rich. I never really did anything with the url so I can't say if I was going to get rich or not. (I tend to think not - phrases on t-shirts don't have the same cache as they did, say in a Wham video from the 80s)
I decided to use the url for my Tumblog. I just officially started using it yesterday, and I love it. Hits that sweet spot between Flickr and this blog.