I've found that Much Ado About Magic is now in both the Ingram and Google Books systems, which means that you can now buy it through independent bookstores. I've checked a few, like A Real Bookstore and Book People in Texas and Powell's in Portland, and it's there. However, the prices at these stores are more expensive than the price I set and that it's selling for in other places. It also seems that Google is selling the PDF version in addition to the epub.
We're hoping that it will be available via Overdrive for libraries to purchase sometime next week. They're pretty slow to get started.