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.