Gmail adds undo-send-email in labs
How many times have you sent an email message and immediately wished you didn't?
Gmail has added a feature that people have been requesting for ages. If you enable the feature (in labs), it adds a 5 second delay to your emails being sent. During the delay, you have the option to undo the email being sent (Awesomeness).
I have to wonder how long it's going to be before other webmail services copy this feature.
Gmail labs: mail goggles
"Google strives to make the world's information useful. Mail you send late night on the weekends may be useful but you may regret it the next morning. Solve some simple math problems and you're good to go. Otherwise, get a good night's sleep and try again in the morning."
How much longer before a button that allows you to cancel an email you just sent (within, say, 10 seconds)?