You can now track two additional time zones with mini clocks that show up when you hover the mouse over the clock.
Add additional time zones:
1. Right click on the clock in the taskbar and select Adjust Date/Time.
2. Click on the Additional Clocks tab.
3. Check the box for either additional clock 1 or 2 and select the time zone.
4. Type in a display name for your click and hit OK.
Now when you hover your mouse over or click on the clock you will see the additional time zone.
You can also add additional clocks to the sidebar by adding more clock gadgets.