I visited the shop a few days ago (and left with my first HHKB), he's definitely still active.
I think his ETA's are just very aggressive/entirely best case scenario. I know that mechlube should arrive next week, but if a order from a OEM does not arrive on time I personally can understand that he does not Update the ETA's that frequently. It sure would be better to update those more frequently, but in some cases it just takes longer than expected and it just can't be said until the bulk arrives.