You mean you haven't ever read the brief?
For your sake, I did a search and found pretty much the same thing that almost all the news outlets have been reporting all along. The most annoying part for me was having to retype it here, so everyone could view the same thing they've been hearing over and over and over and over.
You can click the link at C-SPAN and read the PDF that's provided. (just in case I've made some typos)
Newdow does not allege that his daughter's teacher or school district requires his daughter to participate in reciting the Pledge. Rather, he claims that his daughter is injured when she is compelled to "watch and listen as her state-employed teacher in her state-run school leads her class mates in a ritual proclaiming that there is a God, and that our's [sic] is 'one nation under God.'"
(I won't charge you a fee for the search results I've provided you.)