Alan Hoenig's book, http://www.amazon.com/Chinese-Characters-Learn-Remember-Meanings/dp/0982232403 Characters: Learn & Remember 2,178 Characters and Their Meanings takestakes almost 2200 Chinese characters and ranks them from 1 to whatever by frequency of use, using "official" Chinese sources.
I was surprised to find out that 一 is only number two. The most frequent character is the possessive, 的.