I'd have to say these are my favorite geeky pillowcases to date! The I Heart Robots Pillow Cases ($40) are super sweet and would make a perfect Valentine's Day gift for your sweetie. Two white pillow cases are screen printed with a male and female robot wishing each other good night. And they're from Etsy, my favorite destination for all things handmade.
I'm considering picking a set up for my BF this Valentine's Day . . . The green robots remind me of the Android logo, and my Droid-loving guy will surely appreciate a set!