Mockups what do they look like?
a mock up gives the client the feel of the site and offers them options.
Wordpress mockups can be done in a number of ways.
They can be built in Photoshop. They can be build in wordpress .
Here are two mockups.
The first is build from Photoshop with this image
and it's photoshop changes look like this: Note this took 2 hours.
Note: I have show them how the logo will look, and what rollover colors are.
Here is a screenshot from a test in wordpress:
The theme I used here is Parabola here are the settings.
another example: