How do I view WAN address of AEBS?

I have an AEBS and have to make some changes to use the Air Video app for my iPhone.
I have to switched it to Bridged Mode and also set up Port forwarding on my comcast router (SMC 8014) to get Air Video to work over the internet.
The missing piece is I need to know the WAN address of my AEBS. How do I find this out?

Have a look in System Profiler/Network/Locations.
For Profiler - Apple menu, Option

Try this website
What Is My IP Address - Shows Your IP Address

But really - if you are trying to get back to your house you should look into dynamic dns. The company I use for the service
http://www.dyndns.com
But there are plenty out there. These guys are free for certain domain names.