I agree with the previous poster--it's usually around the 6 week mark when you begin to feel nauseated (although not for everyone, but that's the average). It was between weeks 6 and 7 when the nausea started for me, with both my first pregnancy, and this one as well.
Married my best friend - July 06'
Mommy to Liam Carter - May 07'
Lost our little angel - m/c January 08'
Our newest bundle, Brody Anderson! - February 09'