In BBedit I typically Open from SFTP Server...
, edit the file, then hit CMD-S to save it to the server. Then I can test my changes. I liked how DreamWeaver gave the option to automatically save the local copy before putting to the SFTP server.
Is there a one-step method for saving a file you're working on to local and the remote server?
I've determined there's no way to do it without using external scripting (like folder actions, etc.).