I bought Transmit for iOS when it came out, setup my servers and then left it. I never used it and never saw where it was useful. And then I read this post from Gabe and saw that the power is in the iOS extension. Essentially allowing you to send any file to a web server for saving.
Now do that, and then sync that folder you send stuff to over BitTorrent Sync back to your Mac — and well I am a happy camper. Awesome.