SharePoint Online Plan 2 question

Hi All,
I'm interested in getting SharePoint Online see below

http://office.microsoft.com/en-au/sharepoint/collaboration-tools-compare-sharepoint-plans-FX103789400.aspx

I'm interested in the Plan 2.

What i want to know is can i use my domain and use it like a public site or i just get one xxxx url address.

Thanks in Advance