Last week (or it may have been the week before) a new VMware Fling was released to allow VMware Tools to be installed in a nested ESXi server.
The tools for nested ESXi are installed using esxcli software vib. The package can be downloaded and placed on a datastore accessible to the host or, if the host has Internet access, it can be downloaded and installed directly from VMware. To download and install the tools using esxcli simply use the following esxcli command from Tech Support mode or SSH:
esxcli software vib install -v http://download3.vmware.com/software/vmw-tools/esxi_tools_for_guests/esx-tools-for-esxi-9.7.0-0.0.00000.i386.vib -f
The ESXi host can also be issued a Guest Shutdown to gracefully power off the host.
Very cool stuff (Especially for the home lab)!