Two examples in scripture particullarly give me reason to wonder. Elijah and Enoch. Two witnesses, according to scripture, " at the mouth of two witnesses let every matter be established " who did not die ordinary deaths. Genesis 5:24 & 2nd Kings 2:11 describe Enoch & Elijah, respectively. Two witnesses are all that's required. I've had a learned Bible teacher, Non-Witness explain his version of Ecclesiastes 9:5 & 10. That Solomon was so far in sin and rebellion at the time he wrote it, that all he could see was death, non existence and depression. However...
And Enoch walked with God: and he [was] not; for God took him. Genesis 5:24
By faith Enoch was translated that he should not see death; and was not found, because God had translated him: for before his translation he had this testimony, that he pleased God. Hebrews 11:5 a cross reference from Genesis 5:24
And it came to pass, as they still went on, and talked, that, behold, [there appeared] a chariot of fire, and horses of fire, and parted them both asunder; and Elijah went up by a whirlwind into heaven. 2 Kings 2:11
Kinda' hard to call it from this angle. Seems like life after death existed for some as opposed to the general population. Yahweh has his special ones, I would assume even now. You've opened up an interesting can of worms Truth Seeker. I'll need to confirm notes and get back to you on this one.
For starters, this might pour some gasoline on the fire http://getstarted.wordpress.com/2008/01/17/what-is-the-great-cloud-of-witnesses/