No excuses for why it took us so long to add it. But it's live now.

You can now adjust your timezone underneath your site settings.

Thanks guys. This would help creating scheduled post based upon my local timezone.

UPDATE

Scheduled post doesn't work with JST timezone. (maybe with all timezones except Pacific Time?) I just sent feedback to posterous staff.

UPDATE (Sep 10, 2010)

Timezone works properly during this week. Thanks alot!