A Q&A with Rand Miller and Robyn Miller done this past August. They talk about the making of Myst and Riven, work on Obduction (video game), and at 4:50 a bit about the Myst movie.
The first hard-copy volume of The Book Of Atrus graphic novel by Heather Larkin is available to purchase. It includes a bonus chapter that was not published with the rest online;
You can also read it online here for free (excluding the bonus chapter);