Our intranet website at work is not available to the public but I have a few suggestions:
-Organization Charts of the employees (CEO to CS)
-Human Resources information - ie. internal job postings, health insurance benefits, company policies re: confidentiality, promotions ...
-Client Services information - changes in deparment info, rules on how to properly service a customer, incentive programs and employee of the month...
- Marketing information-how much the company pulls in per week and which wholesalers have been rated most profitable...
-Information Technology- Infrastructure Org Chart, changes in equiptment, conversions and implementations, contact information, documentation...
... oh, a stock ticker and a social section is kind of a nice little twist that will entice people to read everyday.
This will get you jogging with more ideas.