As far as gear is concerned I found some good suggestions at: http://travelwithkids.about.com/od/underfives/tp/babygear.htm

Our travel agency Vacationkids.com has great articles about family travel and they have one for flying with babies that may help...
http://www.vacationkids.com/travelarticles/flybabies.php
Also on the vacationkids travel links page you'll find a link to the Transportation Safety people (TSA). Our agent told us to check here before we packed and you'll find a whole list of what you can and cannot take on board the plane.