The one drawback to using Smashwords as a portal to other retailers (iBooks store and the Nook store are my biggest non-Kindle markets, but they also cover Sony and Kobo, and a few others) is that it takes a while to get the sales numbers back. Smashwords just recently updated the May numbers both Apple iBooks and Barnes & Noble Nook sales reports. When it came to giveaways, Nook was a winner, at least for me. I gave away over 4,000 Nook copies of The Sixth Discipline! That doesn't compare to the 15,000 copies I gave away in May on the Kindle, but it's still a lot more books than I ever gave away before on any other non-Kindle platform. Sales figures for No Safe Haven, the sequel to the free book, were pretty good for the Nook, but about 20% higher for Apple. I wish I had some giveaways stats for iBooks, but it seems like Apple no longer bothers to report “sales” for free books, so I don't have much to go on in comparing, but since the Kindle and Nook giveaway-to-sales ratios are very similar, I think I probably gave away about 5,000 iBooks copies. Since I don't know for sure, I will go with Nook as the giveaway winner.