This isn't necessarily digital stamping but it is digital in a sense. Both BasicGrey and Shabby Princess have backgrounds that you can download to your computer to make you desktop background a little more personalized.
Shabby Princess gives you a template that you open in your photo editing program and you can add your own picture to it.
BasicGrey's is just a calendar but it's still pretty.
Here's a screen shot of my desktop:
This is from Shabby Princess and I inserted a picture of my kids 1st day of school from last year.