another solution to your problem is you can go over to "http://www.dyndns.org/", sign up and use the free dynamic dns services. this allows you to from a list of their domains and add your own prefix and whola .. that's the new dns entry to your machine. it does involve some configuring and download of a dns update client but i got mine up and running in 5min. it might not be the answer you were looking for but it's definitely a possible solution ...