I dont exactly have a dashboard but if I could I would put all my monthly reports in it. Right now I provide a monthly report which has graphs and charts (Top 10) covering the following
1. Virus - detected, cleaned, PC name and Username (identify repeat offenders)
2. Patching update
3. Graph on number of attacks by type
4. Graph on most targeted servers
5. Any security incidents within the month.
6. External vulnerability scans - server and number of vulnerabilities identified/fixed.