Rather sit back and watch? Check out the online demos of:
An Introduction to Vyatta >>
Vyatta Software Installation >>
Getting Started with Vyatta >>
VMware Virtualization Demo >>
More detailed doc outlining basic configurations for interfaces, routing protocols, firewall rules, NAT, VPN tunnels and more choose the guide for your software version from Documentation >>
Vyatta also offers a very complete set of documentation that is available for download. Documentation Set >>