I noticed that jVi module is available for NetBeans 6.0 release. You can use vi keybinding on NetBeans editor.
It consists of two nbm files. Once you download and unzip it, you can
install them from Tools > Plugins, Downloaded tab. Click Add
Plugins... button to bring up file dialog.
Select two nbms, multiple files can be selected here. Then click OK button.
Click Install button to install these plugins.
To disable/enable Vi keybinding, select jVi item on Tools menu.