The promotion started at midnight (PDT) on March 31st (so that was 6pm AEST, or 7am UTC). It ends on April 2nd.
I've made Wild Thing free for all three days (actually, a bit more: both before and after). Unfortunately, because Harsh Lessons's Kindle Select Term ends (rolls over) on March 31st, the best I can manage is to make it free on the 1st and 3rd days: Amazon have no way of pre-allocating free days in the next term, nor can they set the price to free on the current day, even if you do it at the start of that day.
The purpose of the promotion very much aligns with what I think is the key issue for authors working outside the traditional publishing environment: being discovered by readers. It also helps readers discover books they've never heard of. And who knows, some of those writers in the promotion might become your next favourite author! So I'd encourage you to have a browse of the titles available over there at the Support for Indie Authors event.
Various writers there have been working hard creating promotional images for the event and sharing them for all the participants to use. C.B. organised a Thunderclap; Christina McMullen organised the event and put together the event site, and all the authors helped with promoting and discounting their books. One member, Missy Sheldrake, even made a couple of promo videos you might like to check out, and uploaded them to Youtube here and here!
I'll be back at work on Shadow Hunt from April 1st, having received an interim critique of the 1st 200 pages from Dave at ThEditors.com on Friday night. (He said it's looking pretty good so far.)
(I'll post this same article over on my other blog.)