@Marcelo: issue the following command in a terminal, this will make the launcher never hide:
gconftool-2 --type=integer --set /desktop/unity-2d/launcher/hide_mode 0
@Marcelo: issue the following command in a terminal, this will make the launcher never hide:
gconftool-2 --type=integer --set /desktop/ unity-2d/ launcher/ hide_mode 0