I take no credit for this, but I found that this works great for changing the colors on your TP, particularly the top and bottom bars:
http://forum.xda-developers.com/show...06#post1876106
The themes that are on that thread do not change your clock or your icons - only changes the colors on your screen (so don't worry about your existing customizations). I'm using the pre-made blue theme with a blue wallpaper I had, and it rocks. There's a program there for you to make your own colored themes as well.
Also, I came across this site, which looks interesting:
http://mperfect.net/tskTsk/
Let's you turn any .jpg into a tsk file. Then you just drop it into the windows directory and select it under settings\today. Kinda cool how the image stays in the background of your menus.
Enjoy!