As much as I talk to s0br on a regular basis, he goes on sleep deprivation binges. He's more than likely asleep, he's online, but not responding.
That being said, I have multiple things going with him presently and him being away for less than 24 hours is not a huge concern for me. Stop spreading FUD amongst the thread as it's doing absolutely nothing. If you don't feel comfortable, then bail. There's no reason to throw him under the bus when it's not even been a full 24 hours... I was in contact with him a mere 12 hours ago, and I went to sleep and he was still up. So logically, knowing that he hasn't slept in a few days -- The body probably shut him down.
Just chill.
I dont know the OP but I do the sleep thing myself, it's almost 4pm and I just woke up around 3:30pm.
I'd say if after 36hrs there's still no response, get concerned, nothing after 48, then leave.
He'll be online at some point, my guess this evening. The first word I hear from s0br, I will update the board. I will also let him know that is presence his requested to shed some light on matters on the forum.