I just marked the ONE.3 sold out because I'm out of new/old stock units. I'm not comfortable enough with the last ONE.3 production to make more so this is probably the end of the road for Tripath based boards.
We still have lots of parts and more than 30 return/refurb units if someone is desperate for one and can't find on the used market.
Jason is still building cables merrily. So please feel free to buy cables from Jason!
There is another R&D project active. If it bears fruit I'll let everyone know.