Check it out: iRex has revamped the directories in the developer portion of their website.
Here you can see they've added a directory for iOn, which I assume is the most recent software for the 1000 Series. And in the
iLiad directory they've rearranged things a bit and added a new directory for... wait for it....
"The sources for the iRex-developed software of the iLiad operating system."
Now, most of the new directories are empty at the moment. But clearly this is a prelude to the software release later this week. Very exciting!