I bit the bullet today and purchased http://roostersrail.com! I knew that it has been available for some time but up until now I have not bothered to purchase it. But now I have become sufficiently attached to it I decided that I didn't want anyone else to have it.
So I now own another domain and I'd like to think that I will hang onto this one. I guess that it makes the Rail seem more like mine. In addition to that if ever I move the blog I don't have to get everyone to change their bookmarks, I just redirect the forwarding from my domain administration. This is a very convenient feature of having your own domain for your blog or website.
So update those bookmarks! Why not head on over to the good guys at Go Daddy and get a domain of your own, it is cheap too!