Transmit 3.2 supports Automator actions, one of which is “synchronize from your Mac to a remote server.” This makes updating a Tinderbox site like this easy as cake. Use Tinderbox to export the files and run then run the workflow — Automator will tell Transmit to connect, synchronize, and then disconnect. I’d written an Applescript to do pretty much the same thing many moons ago, but the recent releases of Transmit broke the “quit at the end” portion. This is much slicker.