Most admins will have used or set up ftp servers to facilitate transfer of data between machines. A colleague mentioned seeing a utility that combined backing up ms sql data and the use of an ftp server as the destination for the backup. The utility he had seen was SQL BACKUP and FTP from http://sqlbackupandftp.com/.
There are several different paid for editions at a very reasonable price. There is even a free 2 database option which would certainly suit small business users who only have single instances.