First thing that struck me was professional designers probably wouldn't use this, they're likely not willing to give up complete design control to a wysiwyg tool, and most have preferred cms and tools.

So with that said, seems the best target is hobbyists, casuals, or people like small business owners who want to save a buck by trying to make their own site (I know several small business owners who have rolled their own site with dreamweaver, for example)

I'd love to see it with a landing video that talks about the problem it solves for people with no experience, rather than using terms like "standards compliant", "hosting platform", etc.