That's what http://www.yourpane.com uses, so that when someone sends you a link you don't have to enter your password to use it.
As a matter of fact, it forgoes passwords altogether, using a secret token to log you in. It also creates an account as soon as you send a link to a friend, so there's no explicit account creation either. This is done to avoid the obvious hurdle, as it allows you to send links to your friends without them having accounts already.
As a matter of fact, it forgoes passwords altogether, using a secret token to log you in. It also creates an account as soon as you send a link to a friend, so there's no explicit account creation either. This is done to avoid the obvious hurdle, as it allows you to send links to your friends without them having accounts already.