Posterous has been adding many more themes lately to their service. A few weeks ago I noticed that Drew Olanoff had a sweet looking theme on his Posterous that reminded me of the default theme used by SweetCron. I really like how items are displayed on the home page when using that styled theme so I decided to take a look if it was a new one added to the service, and sure enough it was.
To change your current theme to this new one all you need to do is visit your Manage page and then click on “settings” and then click on the big “Theme and customize my site” button. Then scroll down to the theme titled “MyList” and select it. That’s it. You will now enjoy the look of your Posterous site in the way of a grid of pretty thumbnails displaying your posts.