Cisco has introduces software licensing with the IOS 15.0
My first reaction was to mourn the exiit of my faithful friend...DYNAMIPS.
But on a closer look, the IOS licensing DOES NOT directly affect dynamips.
"Cisco Software Activation is a simplified approach to software deployment and management, and is implemented on Cisco Catalyst 3750-E and 3560-E Switches and Cisco Integrated Services Routers Generation 2"
Dynamips CANNOT emulate the devices with licenses yet.
The Licensing hasn't been implemented on the 7200s yet so we can still run the 15.0 on the 7200 routers.
Thanks to Ivan of "Cisco IOS Hints and Tricks" for pointing this out.
I guess we can still have fun studying afterall :-)