Since we know what has happened in the first half of the last season of the show we can look back at what the first hybrid said in the movie Razor and start to understand what he was talking about and what he might be saying is going to happen.
"At last, they've come for me. I feel their lives, their destinies spilling out before me. The denial of the one true path, played out on a world not their own, will end soon enough. Soon there will be four, glorious in awakening, struggling with the knowledge of their true selves." - Now in the highlighted text we can see now that he was clearly talking about Tigh and the others finding out that they are cylons.
"The pain of revelation bringing new clarity and in the midst of confusion, he will find her." -I think its fair to assume that he was talking about Adama finding Rosilin after the baseship jumped.
"Enemies brought together by impossible longing. Enemies now joined as one. The way forward at once unthinkable, yet inevitable." - This is obviously speaking of the events that happened in the midseason finale with the rebel Cylons joining the fleet in their jump to 'earth'.
"And the fifth, still in shadow, will claw toward the light, hungering for redemption that will only come in the howl of terrible suffering." -Now here is where we can debate about the meaning of his prophecy and here is where I will make a guess about who he is talking about. Ellen Tigh: Clawing for light makes me think that the fifth has been 'killed' and buried and claws their way out of the grave. And redemption meaning Ellen's working with the Cylons. You may disagree.
"I can see them all. The seven, now six, self-described machines who believe themselves without sin. But in time, it is sin that will consume them. They will know enmity, bitterness, the wrenching agony of one splintering into many. And then, they will join the promised land, gathered on the wings of an angel. Not an end, but a beginning." - And now here is my final interpritation of events that will happen. Since the linear line that he was describing makes me believe he's talking about something that is yet to happen I believe that when he said that 'The Seven, now six' makes me think that he wasn't talking about D'anna being boxed but instead that one of the Signifigant seven models will completely die. I think D'anna will die in the second half of the series finale simply because she's the only one of her model left. The reasons I think this is because the Cylons have sinned against one another and the final big sin was destroying the Hub making every death for them a real and permanent death.
Then comes the part where he says they will join the promised land This makes me think the planet that they fleet is on right now is not earth. In the previous verse he called the planet 'The way forward' instead of the end. And in the last line he calls where they are going to go on the wings of an angel (Who that angel is is debatable: Kara Thrace, Rosilin, Baltar?) will find the promise land, and it will not be the end but a begininng of a new civilisations and possibly and new race of people Cylons and Humans becoming one?
Now by all means call my reading of the prophecy insane and give me yours