Here's two cute headers to 2 column Minima blogs. Which is your choice?
Just click the image to enlarge it and then save it to your computer. Then you can add it as a header to your blog.
These headers are in png-format (the most of my headers are). Make sure you save it to your computer as a png-image. If you save it as a jpg, there will be a not so beautiful white borders in the header.