I've created a new child theme which you are all welcome to use on your WordPress.com blogs.
It is a child theme of Titan, so all you need to do is to activate the titan theme, then copy and paste the CSS from the following page to use the new design.
Here is a demo site:
And here's a blog post about it:
Hopefully some of you find it useful :)
The blog I need help with is cobaltcloud.wordpress.com.