My position on this is quite simple. There is not and cannot be any kind of afterlife. This is because our personality, soul, character or whatever you want to call it, is a function of the configuration and activity of our brains and nervous system. When we die all this is lost. Anyone who claims otherwise needs to explain how such characteristics are transferred to some other etherial medium. In response to your specific questions: - 1) What other evidence is there of life after death? None whatsoever. And I don't accept the scientific validity of the anecdotal evidence of Zink, van Lommel and others such as Colin Wilson. - 2) How do sceptics account for the comparative uniformity of experiences shared by hundreds of people? All human brains work in much the same way. - 3) How do believers conceive of an afterlife? I've had discussions of their views with many believers of all sorts, e.g. at Interfaith Fellowship meetings, and find they all either believe entirely different and incompatible things, or are hopelessly vague about what they think really happens.

The believers I'm familiar with conceive of an afterlife according to whatever books they consider authoritative.
In general, pantheists go for reincarnation, monotheists for one eternal hooraw. I would consider reincarnation more reasonable, despite the fact that pantheism is inherently irrational, in the sense of having some parts of God contradict other parts.

DHW referred to my bringing up the issue of afterlife in 'near to death' episodes, a previous thread. There are a number of verified episodes of a dying person, with no chance of communication outside of their place of dying, coming back from a near to death episode with the knowledge gained during that episode that someone they knew had just died. I heard the testimony on Houston radio from a hospice physician who was amazed by this, as it had happened to several of his patients. There are many books and articles that mention this phenomenon.
The dying patients claim they learned this at the end of the tunnel from persons on the other side. The'other side' contains persons in the afterlife is the claim of these dying patients. Hallucinations don't invent real information.