I use clips and only clip about 9" or 10" inches ahead of where I am working, work my way to the end of the clips and clip ahead again. I also saw the following tutorial for sewing the binding using a ladder stitch a while back:
http://www.quiltingboard.com/t-40083-1.htm
I have used this method ever since. It is a lot quicker and looks better than using a whip stitch (or at least better than using MY whip stitch).
If you look at the tutorial, be sure to look through all the pages as the instructions are spread out.
Good luck!