At present time, there isn't a great deal of information on this page. This is unlikely to change.

A script for making the default OpenBSD boot floppy use a serial console instead of screen and keyboard can be found here. Aside from the sheer thrill you get from installing over a serial line, it's quite useful when your machine is placed a hard to reach place or you don't have an extra screen and keyboard. Note that the script requires Open- or NetBSD. I haven't tried it with FreeBSD, but it might work.

OpenBSD 3.6 on a Dell Inspiron 4000

Not much to say, really, it works quite nicely out of the box. However the Lucent win-modem doesn't work, but in this day and age, it's not really that important.

APM

APM works just beautiful on this laptop. Just enable the apmd daemon(change apmd_flags=NO to apmd_flags="" in /etc/rc.conf). If the lid-close switch is broken (as it is in my case), you can suspend to RAM with Fn+Esc or running apm -z. A less drastic action is to only turn off the screen with Fn+d.

If you still have the original suspend to disc partition, you can even - surprise, surprise - suspend to disc with Fn+a. Just make sure to choose the suspend partition in the boot manager (labeled ??) when resuming.

In the case the suspend partition have been erased, it can be recreated with Dell's s2d.exe tool (search for RH7Sd.exe on Dell's web site). It's just a self-extracting zip file, which can be extracted with unzip. Copy s2d.exe to a DOS boot floppy (FreeDOS comes to mind), boot, run s2d.exe and voilà, you are ready for the wonderful world of suspend to disc.

If Linux is your thing, a few guides can be found at TuxMobil