My opinion is that the features you are working on are not really specific for a new blogging platform. If you want to test these features in the blogosphere, I would recommend building a WordPress plugin to test the waters without having to reinvent the rest. If that interest you, you can also distribute a template with the plugin included and make a demo (or use it for your own blog) to show it off.

That way, you would be able to focus on what's important to you.