I’ll make an exception and place the subject of the Tutorials in the title, as upgrading to karmic could turn being a nightmare to some.
I’ve stepped out of the Tutorial & Tips section to visit two tutorials, one of them in T&T, the other one in the current Karmic Development section. Both threads will let you know everything you always wanted to know about grub2 (but were afraid to ask). Both are from drs305. grub2 is default with Karmic and can be installed on Jaunty.
The first one, “GRUB 2 Basics” will get you started with grub2, in particular with the /boot/grub/grub.cfg and /etc/default/grub files. The second one, “Grub 2 Title Tweaks Thread” will help you tweak grub2 titles to your desire. Before upgrading to Karmic, make sure you read both of them!