Back in the mists of time, I wrote about Jakob Nielsen‘s top ten blog design mistakes. Including: not having your own domain name. My response: there are several sites I read and respect that do do this, but if you want to be completely sure you control your own reputation, you need to control your domain name too.
One thing I didn’t consider, though, is that the people who host your site can, if they want, control what you put on it. Filter out things they don’t like. You could, for example, do what News Corporation subsidiary Myspace have been caught doing: censor links to video-hosting sites, presumably because these sites will soon become News Corp’s competitors when Myspace introduces its own video-hosting service. You might think you can say anything you like on the internet – but if you’re a Myspace user, that apparently doesn’t apply.