[Mika]

Wordpress has an interesting feature, it allows you to create multi-site websites. Multi-site websites are websites where you can create unlimited websites within the same domain and manage all of these websites from the same dashboards. You do not have to use subdomain or create a separate website on the directory. You can create new sites from the wordpress dashboard. Have you explored this feature?

[Cuddy]

The only one I know about is creating a subdomain and I think it will be an interesting feature. I will have to check it out.