Quoting from the Tehuti official announcement:
Tehuti Networks, a semiconductor company providing 10 Gigabit Ethernet (10GbE) single-chip, low-power TCP/IP acceleration controllers, today announced it has joined the VMware Community Source program. The co-development effort as a VMware Community Source program member allows Tehuti Networks to create and validate enhancements to VMware ESX Server to maximize the performance and functionality of Tehuti Networks’ series of Ethernet controllers and adapters in the VMware Infrastructure environment.
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As a VMware Community Source program member, Tehuti is planning on working closely with VMware on optimizing Tehuti 10GbE dual-port controllers for VMware Infrastructure 3, enabling unique adapter capabilities, and collaborating with the partner community on future I/O virtualization techniques…
In November 2006 Tehuti already became a XenSource IHV Partner as Charter Member, meaning the semiconductors company is seriously investing in virtualization.