The Mac OS X Open Source ftp/sftp client CyberDuck 2.7 was just updated. If you're looking for a GUI ftp client to use on the Mac (or even old UNIX hacks like me who still mostly use ftp and scp from the terminal command line), you might want to take a look at the rich feature set in this Open Source app. In addition to ftp/sftp file transfers, it supports using an external editor for remote file editing and provides a Dashboard widget.