It is a scary feeling. You write, and write, and write, and now, after all of it, it's almost over. You're probably feeling an affinity (sp?) to your characters by now, and to end it (I don't know if there's a sequel or not, so I'm assuming it's the end.) is kind of sad, really. You know these 'people' to their very soul. You created them, watched them win, lose, fight, and feel emotions, and now it's almost over.
I felt all that with my first (and now I dread editing it, because I did detach myself from them). There is a bit of relief, because when you hit that last key, you will know that everything is as it should be in that world.
Velkyn
P.S. Congrats, man, good luck on that final key.