Full SharePoint backup with Powershell script
This script backs up everything you need for a full restore of your Windows Sharepoint Services (WSS) or Microsoft Office Sharepoint Server (MOSS).
Sites, 12-hive and IIS Metadata is compressed and saved on a userdefined central location. The XML configuration file contains the settings of one or more sitecollection backups with different backup/reporting parameters for each job.
* Backup of Sharepoint site collections with STSADM 
* Backup and compress the 12-hive 
* Backup and compress the IIS Metadata (portable with encryption password) 
* Multiple settings for different site collection backup jobs (configurable in the XML-file) 
* E-mail report
http://www.codeplex.com/spbackup