The info on IWEB states that some of the features will not work unless you publish to .MAC. One of the things that it says will not work is the slide show and I think movie functions will not work as well.
I have had no issue with any of the functions. All you do is publish to a folder, then use an FTP app to move the entire content of that folder to your host.
www.zoolook.us
Slide show works. I've also had the podcast and movie working fine too.