Something similar to Thunderbird Send Later extension, for sending mail at a later date. Thanks.

Interesting idea. The major problem I see is that Gmail doesn't support delayed sending (ie. server-side). Therefore, you'd have to do everything on the user's side of the equation which means leaving the browser open, and thus, sort of defying the point.

The only other way I can think of is to relay the message to a 3rd party server which remails it using Gmail. I'm pretty sure that violates the TOS in some way though and in any case, you'd have to give the 3rd party your login and password.

What about an integration w/ Gal, plus some sort of filter? Could a script handle all that?