Could not connect to campus wifi through leopard

Your campus probably uses some sort of "extra" security with their wireless networks eg, 802.11X which may require extra setup. (there is a tab for setting this up in your airport network preferences - look for 802.11X).
Try looking for specific setup information on your campus IT website, they may have detailed instructions to help people having the same problems.
Failing that ask your campus IT department for help.
There's little else I can suggest unless you reply with more specific information on why Leopard can't connect - eg, what exactly happens when you try to connect

You may need to access the network with the ASCII password. Is there a system administrator you can contact to get this code? It will be a very long string of characters and replaces the typical password you seen in many Airport type setups.