Subdomains
Now.nu - This server offers you a Free sub domain account such as www.yourdomain.now.nu and also free email to go with it, the best thing about this service is that is not only free but you dont get popups or banners added to your site, is your choice if you want advertisement from them or not, which makes it even better..
Dot.nu -This one is just like the one above it offers free sub domain names.
CJB.net - just like the other ones above