Bootchart is a tool that monitors and graphs your Linux boot processes. The detailed view will allow you to view CPU and disk usage, as well as the timeframe that certain daemons and modules require. This seems to be an interesting option for Netbooks and optimizing OS startup time.
The analysis can be rendered in png, svg or eps format and are dumped to /var/log/bootchart/
Here is an example from my Acer Aspire One running Ubuntu