I also pre-ordered and it stated that it would include the mp3 original soundtrack and PDF Art of Shadowrun: Hong Kong book included. I noticed that my copy was the standard version and I actually got upset thinking that they just cheated me but going to GOG.com (originally in order to make a complaint) I went to my library and clicked on Shadowrun: Hong Kong and found that on the details page it showed that I could redeem a code to get the additional goodies which I qualified for due to pre-ordering. I redeemed the code and refreshed my library. Sure enough, my copy is now the Deluxe Edition with the extras. Make sure you log in and check yours as I'm certain you'll find the code. It's just kind of crappy that I didn't even get an e-mail to let me know when Shadow Run: Hong Kong was released nor telling me I had to redeem a code in order to get the extras.
