“No sabrás todo lo que valgo hasta que no pueda ser junto a tí todo lo que soy.”
– Gregorio Marañón

Let’s face it: installing VMware ESXi from a CD-ROM or from a USB key is painfully slow. Installing from the network is faster and more flexible. And preparing VMware to be installed from PXE turned out to be very easy.
The ISC DHCP configuration file could look like this:

# cat /etc/dhcpd.conf
default-lease-time 86400;
max-lease-time 604800;
option subnet-mask 255.255.255.0;
option broadcast-address [...]

Creating a bootable OpenSolaris LiveUSB might prove useful in some situations, for example when installing OpenSolaris on machines without a CD/DVD drive. First, download the OpenSolaris LiveCD image.
Next, install SUNWdistro-const:

$ pfexec pkg install SUNWdistro-const

Generate a USB image from the contents of the LiveCD image:

$ pfexec usbgen osol-0906-x86.iso osol-0906-x86-usb.img /var/tmp/solaris

Dump the USB image into the USB [...]

When it is not possible to install VMware ESXi 4.0 from a CD/DVD drive, and if the machine supports booting from USB, one can easily install from a USB drive. Preparing the USB drive to install ESXi 4.0 from it is very easy:
Create a FAT32 partition on the USB drive:

# install-mbr /dev/sdX
# fdisk /dev/sdX
…
# mkfs.vfat [...]

Currently available version of Google Talk Video plug-in for Mac OS X (1.0.13.1284) might cause up to a 30-second delay while putting the computer to sleep under Snow Leopard.
This has been reported and discussed in the following Apple support thread. In the end, the solution typically requires to uninstall Google Talk Video. The solution was [...]