FTP from home & office on Broadband.

I have two broadband accounts, one for home and one for office. I currently use PC Anywhere on a dial-up to back up my files.

I would like to use my broadband accounts, but with dynamic IP addresses it seems FTP would not work.

How can I transfer files over the internet without an FTP server in between? Would routers allow me to see my other machine over the internet?