I don’t have any copies yet, myself, but I hope to have some in time for Supanova this weekend. If you can’t make it to the show, amazon is your best bet.
The print edition retails for $19.99. The ebook is of course still available, and still priced at $4.99.
I don’t have any word on when the book will be available in bookstores, or to what extent, but you can of course special order them in any retailer that deals in new books.