I often connect to my home comptuer using tight VNC, and sometimes my IP will change - as I’ve got DSL. So what I did so I don’t have to memorize my ip, or have to worry if it changes while I’m gone is this:
I have a program running on my windows machine called Keep me posted. It runs as a background windows process so I never see it. It uses a site like whatismyip.com to read my external IP address, puts that into a html page, and uploads it via FTP to my website.
I set it up to upload about every 30 min, and put it in a directory that’s password protected via htaccess. So now I can just pop onto an easly remimbered sub-directory and see my comptuers IP address from anywhere.
Perhaps this, or something similiar will work for you?