You may notice that this blog's header has changed...
If you're very observent, you may have also noticed that it's random. After some searching, I found a .php script that grabs a random image from a number of images stored on the server, within the same directory (thanks to Taylor). What does this mean in 'normal' speak?
Each time you visit a sub-section of this blog; if you refresh the page, or each time that you visit the blog, the header image will change. At the time of writing there are currently 6 different images, but this number will soon increase, as I find more and more images to shove into the header.
I'll be using this same technique on my next site development - it should allow for a 'fresh' looking site each time you visit...