Earlier this month the US startup Fortisphere announced the plan to support VMware VMsafe.
As part of that plan, or as a separated effort, the company also announced that it joined the VMware Community Source (VMCS) Program, which grants access to the source code of ESX.
A small, selected number of companies joins the program as well. Among them there are Compuware, Double-Take, Emulex, Fujitsu Siemens, Mellanox, QLogic, Voltaire and Wyse.
It will be interesting to see what Fortisphere will do with such level of access on ESX.