VMWare have just released the free VMWare ESXi 4.0.
I have just tested and it now supports Boot from SAN. WOOT!! I have been looking into using USB drives as a way to boot my VMWare farm servers, but am a little nervous about the lack redundancy. So now I can carve out 2gb of redundant storage from my SAN for each server and save on having local disks that are very much under utilised.
It also looks like you can install the Free version direct to USB Drive rather than having to hack together something from the ISO and using DD or winimage to flash the USB.
This is an excellent move from VMWare and I look forward to reporting back on any other new features i find.
And as an a-side the Cacti Graphs found on this site still work under the new version. Now to find out if there is SNMP support in this release or not (I dont suppose I will be given everything I want in one go!)