Had a couple of minor mistakes to correct on the proof of Royal Pines Estates; I just submitted the final file for print. As soon as it's reviewed and I approved it, I'll move on to uploading the Kindle version. If all goes well, the story will be available for sale in both formats by the end of the day.
How did I get the proof so fast? Well, CreateSpace offers a virtual proof, and online version that gives you all the formatting and text on the computer screen. For long books, or inexperienced publishers, I don't recommend it; it's better to have a physical book that you can mark up, dog-ear, and hand off to other readers to help you spot problems.
You can actually print the online proof as well, but on longer books I just go ahead and order it; much easier to pass around. But for this short work, the online proof works just as well, and it gets me to press—literally and virtually—much faster.