Try contacting your ISP and see if you can get a static IP address option. It may cost you some money to do so but if you use remote connection frequently while on business, it might be worth it..
Other than that, I know of no way to get the IP address unless you have a friend or family member check for you. Obviously, they could then email you the address.
Hope this helps.
I currently work away from home for a week at a time. When I leave the house I write down my IP address and from that I am able to radmin into my home computers from wherever I am. But as you know the ISP is constantly refreshing IP addresses every few days and I lose this gateway into my house until I get back home and write down the new one. I was wondering if there was some way I could have my IP address sent to me. I am currently using a WGR614v7 wireless router. My modem is some generic modem with no real markings on it.