You can post a public board to your blog by copying and pasting the code provided. You can change the pixel width to suit. Generally 600 pixels will make a large size that will fit nicely in your blog post.
In Wordpress, make sure you select the TEXT tab and not the VISUAL tab.
Once you have pasted the code you can go back to VISUAL to see how it looks. Please note that you must select your pixel width before you post.