I weigh myself everyday, but have an official weigh-in once a week. I see the fluctuations in myself and they range from 2-3 lbs a day, but as long as my week-to-week keeps going... I'm good.
Oh, and if you guys aren't aware of it,
www.3fatchicks.com/forum/ has a bunch of great recipes that help out. You don't have to sign up to use it.