Beej, I think that link you gave takes things a little out of context. Please make sure to read the whole chapter to decifer what is being talked about. Or at least the whole paragraph.
Psalm 104:29 talks about the physical body (not much relevance to us when we die)
Ecc 9:1-4 talks about all people will one day be judged, the righteous and the un-righteous. It links up more below.
Ecc 9:4-10 basically says, once you are dead, you are dead, there is no turning back, whatever you have done in your life that is it, and that is what God will look at. He is saying that the living at least have hope to at least be able to correct their lives if they have failed in areas, but the dead have no hope. Soloman used a proverb that says a living lowly creature is preferable to a dead exalted creature. The point is not that death is the absolute end of all things, instead, the point is that while there is life, there is hope of doing something to the glory of God.
Psalm 146:4 is talking about the physical body. His spirit departs out to God, and his physical body returns to the earth. We all make plans for the future, yet if our life is cut short in the meantime by the AllMighty, then what happens, our plans perish. These plans could relate to doing something righteous for the glory of God, or just taking a holiday.
Ecclesiastes 9:6 is explained above.
2Kings 20:1 has been completely taken out of context, that badly, that I am suprised. Isaiah prophesied to Hezekiah who was on his death bed telling him that his death was immenent. You have to read the whole story of Hezekiah to understand why Isaiah told him to set his house in order before he dies.
Job 17:13, this is a prayer to God, once again, you must read the whole book to find out what is going on, instead of Job being reassured by his friends, he is being told why he is the way he is. In this specific verse, Job counters the false assurances of his friends with a facetious statement about waiting for the grave as one who longly desires to go home to his house and his long-lost relatives. Job was not a prophet, but he was a righteous man in the sight of God, so everything said by Job and his friends needs to be really read properly to find out if it lines up with the word of God. The book was put in because it shows that even a righteous man who had everything the world had to offer could lose it all in an instance, and throughout all Job went through, he was still righteous in the sight of God, and never blamed Him, instead he said, the Lord has given me, they are His, and now He has taken them away, I thank Him for lending them to me (paraphrased).
Job 14:2 is again mainly answered above, but it specifically says "14:2
He comes forth like a flower and fades away; He flees like a shadow and does not continue." Once again, if the whole book is read, he is talking about the physical body.
So as you can see, none of this explains why NDE's are brain malfunctions, or why NDE's are not from God. I believe NDE's are from God, it would be an insult to Him to just call it a hallucination. Also those verses nowhere state that people remember nothing, it would go against Revelation where it talks about God wiping away our tears, why should he be wiping away our tears if we remember nothing? And yes, I am aware that they are not physical tears.
I hope I have explained all that appropriately, beej, please be careful not to take things out of context, remember God judges those who know the truth more harshly, especially if they teach false doctrines. It's better to be unsure, then to be unsure and teaching that what you think is right from your own heart. Also, people shouldn't just rely on forums for answers, God is the One who gives the correct answer all the time plus there are plenty of books and churches where they can goto to get answers, especially reading the word of God properly would be a great start.
God Bless you all!