I was just listening to the Mac Geek Gab podcast and they mentioned a simple way to get your public IP address.
If you load google, or you have a google search bar in your browser, just type ip and click search. The top thing it will return is your public IP address.
I am always interested in feedback so please feel free to add any comments, or you can mail me here. If you would like to submit a quick tip with full credit and links back to your site then also feel free to contact me.