I have just published a WordPress Plugin, Xtrad Editor, which allows users to edit and publish 3D Scenes on WordPress Sites. The editor uses three.js, an enhanced version of the three Editor and code from the examples.
The 3D Scenes can be anything from a 3D Text Headline, a 3D Slider or a complex 3D Scene.
To find out more about the plugin you can visit xtra-dimension.com.
I have also put up a website where people can try out the Editor before they purchase the plugin, editor.xtra-d.co.uk. There are comprehensive video tutorials on using the editor.
Have fun playing with it.