GHakcs.net posted a guide about speeding up the boot time of Ubuntu

Are you desperately searching for ways to finally reach that elusive 10 second boot time? You certainly heard that Ubuntu 10.04 has the capability of doing just that right? It can…but you have to help it along. One of the ways you can help your boot time is removing unnecessary services and drivers that are loaded at boot time. Fortunately, this isn’t something you have to manually do. How is this? There is a tool that can help the Grub boot loader learn what it is you need at start up. This tool is called profile.

Profile is not a tool you install, or run from the command line. Instead, profile is an option you add to your grub configuration file to inform the boot loader you want to create a profile during the next boot loading sequence. In this article I am going to show you how to profile your grub boot sequence for a faster boot process.

  Speed up your Ubuntu machine boot time