Ubuntu 10.04 installs with GRUB2. See here:
"GRUB 2 is a complete rewriting of the Grub interface. Based on the research project PUPA, GRUB 2 is more modular and portable than its predecessor. Some of the GRUB 2 scheduled improvements include:
* a graphical interface, including theming;
* modular loading;
* cross-platform compatibility;
* scripting support;
* user-customized boot entries;"https://help.ubuntu.com/community/Grub2"
* revised partition naming."
This page gives more details:
# On a new install of Ubuntu 9.10 or 10.04 with no other installed operating system, GRUB 2 will boot directly to the login prompt or Desktop. No menu will be displayed.
# Hold down SHIFT to display the menu during boot (formerly ESC in GRUB legacy).
# No /boot/grub/menu.lst. It has been replaced by /boot/grub/grub.cfg.