I think Norm has something in his files that goes into detail about the best way to season cast iron.
I bought a new, smaller size Lodge fry pan at WalMart in the last year. All I did was wash it with soap, let it dry (on a warm burner on the stove) and then wiped some oil on the inside.
But that's because I read somewhere the new Lodge stuff is pre-seasoned and you didn't have to do much to it.