The Kindle edition of Mind Play is now up for sale on the Kindle Store (see the link to the right.) This version has no DRM and sells for $9.99.
I know a number of people have been waiting for ebook formats. This was the easiest of the ebook formats to create from the original print files. I'm working on an .epub version I will be able to post to the Nook Bookstores and SmashWords.