I thought you might be interested in Mystery Writers of America's (MWA) new "Approved Publisher" guidelines. They're now setting standards to include print on demand and e-book only publishers in this highly sought-after category. If your book is published by an "Approved Publisher" you qualify for "active membership" in MWA.
In the June-July issue of the organization's official newsletter, "The 3rd Degree," they wrote, "The publishing business is experiencing massive changes and if MWA is to remain relevant, we have to change, too. That's why we've revised our Approved Publisher criteria to make books published solely in e-book format or using print-on-demand eligible under certain conditions for MWA active membership... Self-published books whether they are published in print or as e-books, still do not qualify for MWA active membership."
Details are on their website: http://www.mysterywriters.org/?q=PublisherGuidelines