In just six steps (and no curves ^_^)
Again I used Photoshop Elements 4.0 but it should be easily translatable.
First (as always) crop your base
Then duplicate the base twice and set the first on Soft Light 100%
Then desaturate the second duplicate and set it to Soft Light 100%
After that use a light blue, I used #bcc6e5, on Colorburn 50%
Then use a dark blue, I used #0c1178, and set it to exclusion 30%
Finally I added this brush (I think it's by 77words 8S)
Added some text and there you have it
I hope you like it! Tell me what you think and show me what you made, I'd love to see what you come up with.