Still zero evidence this Xena/XMOS stuff will ever find a use, whether it be on board or via an add on card.
I fail to see what it would do for me when the OS itself doesn't even have the bare essentials like a stable, modern web browser. I think people figure it is a vast exaggeration in regards to the sorry state of available software for these machines, but it's absolutely terrible, and I personally have been dealing with it for THREE years.
I'll take the ability to reliably check my GMail inbox on my SAM far before some wacky XMOS solution.