You can have NetBeans use OS X's standard open dialog instead of the poor Swing alternative. To do this, update your "netbeans.conf", mine is at /Applications/NetBeans/NetBeans\ 7.3.1.app/Contents/Resources/NetBeans/etc/netbeans.conf, to include the flag "-J-Dnb.native.filechooser=true" in the "netbeans_default_options" property.
