Virgil's description of Hell really surprised me. Then again, the concept of Heaven and Hell is a subject that has always captivated, both for religious and literary reasons. Christianity has always defined the two possible afterlife destinations as completely and totally opposite, as different as day and night. Good go Heaven, baddies go to Hell, go to church on Sunday and stay out of the whorehouse and you'll be alright. This is the classic mantra of organized religion, a "carrot and stick" means of enforcing morality that still holds sway to this day (thanks in no small part to Dante's Inferno). For those that do not necessarily believe in afterlife, you have the karmic cycle, the righteousness of dharma, and the uber-spiritual effort to escape reincarnation and become godlike.
What's funny about the Roman perception of the afterlife is that, before these religions even existed or held worldwide prominance, they sort of mixed these all together to create something seemingly inspired by all ideals of spirituality, something Rome would become famous for doing. Their afterlife consists of just one zone rather than two, but is divided in to three areas. After crossing the river you enter the city of Dis, comparable to Purgatory or Limbo in that those who are neither righteous or wicked simply wander around seeking answers. It's not great or terrible, it's just kinda lukewarm (no wonder Aeneas went around it).
To the left (sinister) is Tartarus, the Roman equivalent of Hell, containing appropriate justice for the wicked and is just as frightening as you can imagine. Here are the god-defiers, greedy, violent, and the liars. To the right (dexter) are the Elysian Fields, and this is where things get tricky. Yes, it's the Roman equivalent of Heaven, but what surprised me is that for some there is the option of reincarnation, where the soul is purified of the stench of the body still left on the soul so it can be re-released into the world. You see, reflections of Hinduism. In this zone are the priests, artists, warriors, and yes, poets (suck on that Plato)! Notice that those who were totally submissive to the gods are in paradise, similar to the core value of Islam.
I guess when it comes to the Romans who it is they're worshipping isn't as important as actually believeing there's more to life than just this. It makes sense, then, that other religions are echoed in their idea of the afterlife, as it is not the theology that's important to the Romans but the spirituality. Well, there you go, please feel free to comment with questions or criticism. BTW, I commented on Treya's post, Wisdom wins.
Have a nice afterlife! 8D