Tim reached out to me about ProPublica's onion service and mentioned the availability of Single Onions in 0.2.9 alpha (coming back to this thread). Here's part of my reply, which we both thought should be shared with the rest of this list:

Been using Single Onions for all our stuff under propub3r6espa33w for about a week or two now (basically since I saw your note for testing in tor-onions). Things are good so far, haven't had any issues with it so far. (And of course, it _is_ much faster feeling.)

Thanks a bunch for all your work on this!

Mike Tigas News Applications Developer, ProPublica https://www.propublica.org/ @mtigas | https://mike.tig.as/ | 0xA993E7156E0E9923