Printer configuration on Gusty Gibbon has been changed, and it is more difficult (less user friendly) than it is on Feisty Fawn. Here is what I have figured out:
1. From System go to Printing
2. Create New Printer
3. Choose AppSocket/HP JetDirect
4. Ubuntu should detect all available network printers.
5. Complete the rest of the steps.
6. Print test page.