PB 17" 1.33 with 1GB RAM and 4200rpm drive: ~75 seconds from power on
Also, as for the Unix on 24/7 debate, keep in mind that the original Unix servers were not running on laptops and/or desktops. They were running on hardware designed for 24/7 operation.
I seriously doubt that any manufacturer designs their laptops and desktops for 24/7 use. However, many people have left their machines on 24/7 with no issues. Personally, I've done both and never seen a problem either way on any OS. My iMac is only on for roughly 1-2 hours per day, and the cron scripts never run, and it is as stable as my PowerBook which gets the scripts ran daily.
Of course, some operating systems require a reboot to remain stable, but that is another story.
Also, as for the Unix on 24/7 debate, keep in mind that the original Unix servers were not running on laptops and/or desktops. They were running on hardware designed for 24/7 operation.
I seriously doubt that any manufacturer designs their laptops and desktops for 24/7 use. However, many people have left their machines on 24/7 with no issues. Personally, I've done both and never seen a problem either way on any OS. My iMac is only on for roughly 1-2 hours per day, and the cron scripts never run, and it is as stable as my PowerBook which gets the scripts ran daily.
Of course, some operating systems require a reboot to remain stable, but that is another story.