I was worried, too, so I sent him a PM Friday and still haven't heard back. I'm relieved to know he's posted elsewhere on the net more recently...
.... unless....
what if that wasn't really him?
Seriously, I hope he's ok and happily hacking away at something. I'd be stunned if iRex released a bunch of info to him and swore him to some kind of Super-NDA-First-Offspring kind of oath, but at this point I'm just hoping the issues with iRex haven't soured him on iLiad development.