Interesting Cofty. I don't know that I've ever heard someone say that the OT didn't have any belief in an after life. From what I've seen, it was a common belief. Some of the prophets raised people from the dead. (1Kings 17:17-24) 1Sam 28:3-25 talks about Samuel being spoken to after he died.
Job 19:25-27 talks about Job saying that after he died, he would see God. Isaiah 26:19 talks about death being swallowed up forever.
Sorry, I didn't mean to make this an apologetic type thread. But I've never heard that concept before. I think that the Hebrews had a limited understanding of death and what would come after, but it seems like they still believed in an afterlife. I guess 2Sam 12:23 for me is the biggest proof. David's son had died and David made the statement that his son could not return to him, but David would see his son again. I take that to mean in heaven.
Anyway, keep going. I'm interested to see what some people find is right in the Watchtower.