Some time the simple scripts are the best. Disaster Recovery (DR) backups do not have to be made every day. At some places I've worked we made DR backups as little as one a year.
DR backups contain everything. You copy the entire envirement so you can buy new hardware and restore the operation of the needed services as quickly as posible without installing from scratch. Backups on tape are great but how can you restore the data if you don't have a tape server with the right OS and software in place ready to do the restore? VMware makes this eazy because it uses files as disks and you can make point in time snapshots.