I thought I'd put up the results here so you can use them if you so wish.
I haven't watermarked them because that would ruin the appearance, and since they're there for you to download (simply right-click, and click "save as...") and put up on your own blog, there's no link backs or anything.
The only condition I stipulate is that if you do wish to use one, I would really appreciate it if you'd just leave a quick comment saying so.
It's just nice to see where my work goes and what things look like when used.
A quick note about the style: I am quite minimalistic, that's just how I like to make stuff. Also - most of these are 718px by 300px. I find that 718px in particular is a good width for the headers - especially if you code padding into either side (see my own header for an example). But this is based on my own profile which is 740px in total width. If you have a profile which is wider or more narrow than mine and would like me to alter the headers accordingly, do let me know and I'll do my best.
Oh, also, a quick disclaimer: I used Photoshop to create these headers. I have an enormous collection of brushes on there which I've downloaded from various websites. I do not know where I got some of these brushes from so can't credit the designers, for which I apologise. If any of the original designers see their brushes used in any of these images and it offends you in some way, please do contact me and I'll remove the image, or credit you underneath.
Enjoy :)