What is the best dry rub recipe for pork baby back ribs cooked on a grill ?

Alton Brown on the Food Network has a good one. You can use his base recipe and add the spices you like, within reason.

HiCorey33,

This is our family recipe for dry rub:
http://lapadia.wordpress.com/2009/12/04/spicy-dry-rub/

And the sauce that compliments it:
http://lapadia.wordpress.com/2009/12/04/balsamic-barbeque-sauce/

Enjoy, if you give it a try!