Will I be able to use 5 different domain names on the 5 free Business Catalyst Sites that come with cloud membership? If I am setting these up for my clients I would expect to use unique names for each one, correct?
Registering/parking a domain to use with the sites is not a service which is automatically included, but it is possible to associate the sites with domains once you have.
The included sites use the webBasic service through Business Catalyst.
Moving your post to the Business Catalyst forums in case you have further questions.