it cost $70 (for 2 years and $35 for each additional year) to register a domain name such as www.yourname.com and all of the legal stuff go through Internic. Even if you don't have a website with your domain you still can have a domain name with redirecting dervice. forinstance www.namesecure.com or www.mydomain.com  ($49 one-time setup + $70 for domain registration ) offer fast redirection service for instance to your actual homepage such as http://www.yourisp.com/homepages/youruserid/index.html   there are also free redirection services such as www.cjb.net or www.webalias.com.
if you want a real webhosting service, Tabnet (starts at $30 monthly + one-time domainfee) seems to be very well known