I was browsing through my collection of resources and I found a great collection of sample Dynamips / Dynagen topologies to play around with. You can download most of the common lab topologies from the various training vendors as Dynagen .net files. This would be an awesome collection of resources for someone studying for Cisco certifications or just playing around.
Hello Arden,
Another dynamips collection crafted by myself:
http://www.fcug.fr/maquettes-dynamips
Francois / pello on twitter
And my own foray into Cisco virtualisation:
http://invurted.com/2008/04/ccna-test-lab/