This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
And if you need more control over customization of the cell (e.g. to choose your specific custom auto complete combobox instance), then, look at the ComboBoxTableCell source code to see how you may customize it to fit your requirements.