The following articles outline how to perform the same backup tasks that you might have previousl used to use NTBackup to perform.
HOWTO: Backup to tape
As NTBackup has been removed from Windows Server 2008 and replaced with Windows Server Backup, which does not support tape drive, you need to use a third-party application to backup to tape on Microsoft's new operating system. This tutorial explains how you can use BackupAssist's ZIP engine to backup to tape on Server 2008, as well as older operating systems like Server 2003.
HOWTO: Backup to file / disk
This tutorial explains how to use BackupAssist's ZIP engine to backup to a disk-based device (USB HDD, NAS, FTP, REV drive, etc) on a variety of Windows operating systems, including Windows XP, 2003, SBS and 2008.
HOWTO: Backup Exchange Server
This tutorial explains how to use BackupAssist's ZIP engine to perform live backups of a Microsoft Exchange Server (2000, 2003, and 2007) using the Microsoft VSS writer in Windows.
HOWTO: Backup System State
This tutorial explains how to use wbadmin (the command-line backup utility built into Windows Server 2008) to backup and restore your machine's system state.