Christine,
You're right, it is so important to set up a system whereby your grads get prompt responses. Anyone who has any experience running a website knows both the importance of changing it often to keep it fresh and the challenge of doing that regularly. It is very time consuming. I like your incentives. We constantly need to be thinking about what will bring alumni back to our sites. Remember that the main reason graduates come back to their institution is Career Services.
June Gudeman