Well... ive read a lot about it, tried a lot of techniques, and had some unusual experiences in my dreams, which could be thought as being astral projections instead dreams... but i never had a wake-induced astral projection... yet.

Anyway, while i dont doubt our consciousness is not physical, and thus could be able to withstand the death of the physical body, i wouldnt trust this based only on whatever one can percieve during astral projections. After all, when one is astral projecting, its body is still alive, and so all perceptions one has are from the viewpoint of an alive physical body, even if its consciousness seems to be (or actually is) outside it.