...just to add on..
WV32's main function is to send/place weather data and images to your personal website. Like any software push to the web, you must provide the basic info such as account name, password and file directory location at the personal website location.
You can also use it to just feed other weather sites like WU. The same info is required. You would need to first talk to WU and sign up for an account. Then fill in that info into the WU tab inside WV32.
The main difference between the two is that using the personal website interface allows more choice as to how your data/site looks. Although WU is a excellent way to push your data to the net, you don't have much in the way of controlling how it all looks.
Hope this helps.