I am a little out of my depth here.
I have built a website for a friend, e.g. Goofball.com - Your Portal To Stupidity (http://www.goofball.com).
He purchased the domain name and webserver space (hosting service) from a place called netfirms.
However, he has free webspace and web hosting that comes with his comcast high speed internet service. e.g. www.comcast.net/rowan_nicole180/...
Is it possible to host the website on comcast but link it so that when people type
Goofball.com - Your Portal To Stupidity (http://www.goofball.com), they will be redirected (without their knowledge) to www.comcast.net/rowan_nic..
Cheers

Yes. That control would be with the domain name settings. You can do a masked redirect so that visitors don't see the comcast url, but the goofball.com url.