Patrick,  thanks for starting this thread!  Thanks everyone for all of this great info.  I'm in the middle of planning a March Disney trip too!  I found the following web site 
http://www.mousesavers.com/ and it has a bunch of great info and be sure sign up for their e-mail list for coupons.  I'll be there from 3/8 -3/11 for a golf trip with the guys and then from 3/12 to 3/17 my family (almost 3 year old son, wife, mom, etc.) will join me to enjoy WDW.  We're going to stay at a timeshare.  Thanks