Toasters should ding

Ovens and microwaves ding when they are done. Cars ding at the slightest offense, reminding you to correct your operation error. Washing machines ding, dryers ding, even some refrigerators will ding if the door is left open. So why don't toasters ding?
Countless times I have walked in to the kitchen to discover that there was some cold toast sitting in the toaster that I had completely forgotten about (I did that just now). A simple bell or buzzer would make toasters so much more useful to a distractable person like myself. Having a count-down timer on the toaster showing how much time left until you get toast would also help. I would suggest a toaster that e-mails you when the toast is done, but that would be overkill.