Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Yup.

Just create another site under iWeb menu. When you publish, it will have a different url, but still under your main account. You can have as many as you like.....
 
ic, and if you just put in web.mac.com/username it goes to the site on top of you list
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.