Another use for white vinegar is in your dishwasher. We have EXTREMELY hard water and when running our dishwasher we found no matter what brand of detergent we used, the dishes weren't getting clean enough and the dishwasher would smell after awhile. Now, we put in white vinegar at the bottom of the dishwasher PLUS use the detergent the normal way and run the dishwasher (oh and we don't use jet dry or any of that stuff). Definitely helps get the dishes cleaner, plus it is helping extend the life of the dishwasher since hard water tends to ruin appliances a whole lot sooner which sucks.
Thanks for the tip on using it on HE washers! We use white vinegar for everything, but I never thought of using it for that! We'll try it today :-)