Actually, we do know that the Dev was sick, they posted on Oct. 12 @ 5:36pm:
So, I am inclined to believe that they got hammered by the sickness that they were feeling and got a bit behind and has been focusing on getting better and then back to work... a note of "Hey I am OK" would be nice, but sometimes OCD kicks in and a person chooses to focus on one task at a time...
Either way, it is, as the Mod said previously, too early to mark this as abandoned, only been a couple of weeks and, while not posting a message isn't like them, it is too soon to be running around screaming the "sky is falling"...