Here's a link to a great site from my friend Rene Molenaar:
GNS3Vault
Description from the site:
* Cool Scenarios to get the maximum out of your networking experience ;)
* Downloadable topologies that you can use right away with the GNS3 software.
* Different levels of difficulty, there's something for everyone...novice, intermediate and expert!
* The forum where you can discuss about all the labs.
* It's possible to review labs.
* You can share your labs with others.
AND Yes, all for free ;)
