Of course, this is very slow.. and cannot handle incremental backups, but it does capture EVERYTHING.

Install rsync and use it to sync the dev entry as Mark suggested. Slightly more complicated but much faster as it would just get the changes after the first sync and it would also capture every last bit. Honestly I think the real reason nobody has made the "holy grail backup utility" that some of you want is because there are at least a dozen different ways to accomplish backups with existing utilities if you are willing to put five minutes of effort into getting it setup.

-Mike