I setup my first google code project today.
Posting a sftp wrapper for psftp I made for windows.
There may be other sftp options available now, but at the time it was easiest to just wrapper the psftp tool provided in the putty package. (I was already using putty for ssh in windows).
It's incomplete, I only added the functionality I needed, and just started to fill out the other ftplib functions that may be useful. Now that it's available on google code hopefully someone else can get some use out of it.