ESXi on USB

I found this great little tutorial on how to install ESXi onto a USB stick. I know that there are a bunch of ways, but this was fast, simple, and can be done from windows with tools that I already have: WinRAR and WinImage

http://www.vladan.fr/how-to-install-esxi-40-on-usb-memory-key

Give it a shot.

UPDATE: I use this on a dedicated system so I am not concerned with data loss, but from my tests with 4.0 U2 the hypervisor will grab a partition and format it with VMFS.