Wouldn't be surprised to see some sort of support for ACO files in the future.
This would be a good feature request. Please create a new idea thread aka feature request explaining how you would like to see it implemented. There should be an option in the right-hand margin in the Action panel.
Hi! As a workaround, you might take a screengrab from the Kuler app, load the screengrab onto a PS Touch layer, and eyedrop the colors you want.