I have the same problem Kari. Sit ups kill my neck. Have you tried putting one of your arms behind your neck for support? Did that make sence? Thats what i do, it helps a little bit.

Have you seen the ab lounge on tv? I would love to try it. I looked it up online it's pretty expensive. Have you tried the swiss ball? I'm thinking about getting one of those. I'm sure I didnt help you much. Lol.