My online portfolio is hello.my.name.is.[myname].me and I redirect all traffic that does not include this prefix to include it. It's a fun and neat little trick. This way if I give my url to someone I can give the short version and when they type it they are redirected to the longer url.
as yuvadam said above, there's nothing special about this, though. you can do this to any site. for the site above, you can just go to *.withdjango.com.
