The way I understand it, they're dead long before that eternal moment. The Gravitational forces are simply unsurvivable.

Aside from that, it works how you want it to. To assume that they are in a ship possible of interstellar travel, though, is to assume that they have dealt with some of the physics dilemmas we have no answers for now. One possible solution - ever see Abyss? - is to have a bio-jelley atmosphere to create enough pressure to keep the ship from simply caving in like a beer can between your fingers. Flexible, but strong enough to resist destruction. What shape is the ship? Perfect sphere would do a lot to ease the G-force, but it'll warp like wax in a lava lamp at some point.

I would say that if they can remain alive - IF - they can have their eternal moment.

In a way, you could do the inversion thing to justify it. Basically, at some point, the theory du jour was that if you hit the singularity, you would simply turn inside-out and expand again. But if this were true, it might be more like a magnet than a funnel; that is, you simply go from a singularity of infinite gravity to one of infinite gravity, being pulled back into the black hole in a sort of fatal error infinite loop. If I were to write a story of this kind, I would go and read one of Brian Greene's books - The Elegant Universe. This guy actually makes advanced physics make sense.

Edward,

First, I believe that in an infinite universe all things are possible. Second, I find some of the information on the Black-Hole FAQ page to be less than satisfactory. Scientists should refrain from saying that something is impossible simply because they cannot figure a way to test it in nature or laboratory. To say that it is expected to be nonexistent in nature is great, but denying the possibility simply due to our ignorance and inability to imagine exactly how it would work is, in my opinion of course, scientific blashpemy. If the math figures, then perhaps we simply misunderstand the answers. These guys - quantum physicists - are still stumped on 'dark matter' as they call it. What if 'dark matter' turns out to be the 'white hole' and wormhole substance they claim does not exist? Also, extreme conditions tend to make our understanding of physics look rather pedestrian; all our science can't explain a whole lot of what's out there.

Now, what happens if you escape into a dual event hirozon formed by competing black holes of opposite charge and/or rotation? Might there be a seam of eternal stasis where the horizons meet? Perhaps some weird electro-magnetic cushion through which they might travel into either some unknowable place or simply their immortal moment of love?

I guess my point is this: starting from the hard science is great, but what about the speculation part? It's your story; if you believe it could happen and you write that faith into your story, your audience will believe you. Those unable to suspend their own disbelief with any given work are simply not your target readers. So be it. If you believe it in the telling, others will believe it in the hearing. They may scoff later after thinking it through, but as long as you tell the story well, they will be transported to where it could happen - where it did happen: your imagination.