one of the advantages of a desktop application like thunderbird or Outlook, is that the pup up can jump over all other applications. This functionality is not possible in a web browser but assigning a sound to go off in a certain time is an excellent alternative. this brings it a step closer to a desktop application functionality.
another great thing could be if the system could check, when you log in which of the reminders went off, and if the user was not logged in the time of the reminder. the reminder will pop up the minute the user logs in.
this could be great, For future releases.
**** Can this thread be moved to the feature requests forum??? *****