You need to transfer files. Maybe to an FTP or SFTP server, or the cloud via Amazon S3, or using WebDAV. You maintain a website, do backups, or upload photos. The Transmit Turbo engine in Coda was faster. Transmit 4 is scary, wicked fast. With the new Transmit Disk feature, you can now mount any of your favorites in the Finder itself, even if Transmit's not running. These volumes are real: drag files to your SFTP server, save a small graphic to your Amazon S3 bucket directly from Photoshop, or roll your own iDisk-like backup volume. It's all possible in T4.