A multihosted site is not a clone of your main site, it is a subdirectory/subdomain of your main site and can have it's own domain. It shares cpanel with the main site too, I can't say for other peoples multihosted domains but mine don't come with email or their own cpanel log in. Resellers are different.
Yep, I'm with jaguarpc, the images are hosted with my isp atm because there's supposedly no bandwodth limit mentioned. I wonder how long it will take them to shut my site down when I start consuming 20gb+ bandwidth every month. I'm not too worried, jaguarpc's new deal gives me twice as much bandwidth as before for a lower cost.