If you have home DSL, then most likely you have a dynamic IP address, and maybe even port 80 blocking which is probably why you set it up on port 8070 - good move.
You have a few options. First, you can get a free dynamic DNS domain name from
http://www.dyndns.com. There you would set up something like [yoursitename].dyndns.org.
You load some software on your machine that has the Camera. It talks to dyndns to keep your IP address current with the DNS entry. Then on your hosted web site you create a link to the dyndns name.
Hope that helps.