I've been playing with Pixelmator and man is it pretty awesome. Don't write it off because "It's not Photoshop." Pixelmator is a more Mac-friendly Photoshop application that is $60.

Here's a litte tutorial that I made up for you guys to see how I made this heart and how you can too!

From the video post:

Quick tutorial on how to make my pretty heart. I used a Gaussian blur for the shadow and layer-clipping masks for the gradients.

To make the shape of the heart I made a rectangle and put a circle on the tip, making half of a pill shape. Then I copy and paste'd it and rotated it 90