I tried a couple of these over the years, had more problems then they were worth, found a solution, use gmail, keep it open as a tab in firefox, mail yourself the password in the body of the mail e.g. if you sign up for askaboutmoney mail your self your username and password and the text "askaboutmoney password" if you want to retrieve use gmail search facility which is very fast and search for "askaboutmoney password",
Works for me anyway.