Ladies have you heard of Julie Tupler's program? The separation is called a diastasis recti and Julie has developed a method to repair it without surgery. I have been following her program and it has made a massively huge difference for me! I had a 4+ finger-width diastasis and it is now down to around a 1!!! My belly looks almost like the washboard it was before I got pg with DD1!!! DH keeps on telling me how fantastic I look :D
I would strongly recommend you look into Julie's program...
Diastasis Rehab - The Tupler Technique for Treating a Diastasis Recti ...before considering surgery. At least I knew I did not want to resort to surgery. I was in so much pain after Honor was born b/c of my separation, though, which is why I went looking into alternatives.