FreeBSD is just plain old good UNIX with rock solid networking stack. It is quite popular amongst hosting companies, ISPs, portals (such as Yahoo) and a few large financial institutions because of its reliability, robustness and performance.
A new version of the FreeBSD is scheduled for release next week (4-May-2009). A beta 2 was made available for download few weeks ago for final round of testing before the official launch.
The new version 7.2 includes some useful improvements, stability, multiple IPv4 / IPv6 for jails (OS level virtualization that allows root to partition a FreeBSD-based computer system into several independent mini-systems), and much more.
FreeBSD jails are perfect for virtual hosting environments. It jails offers the following benefits:
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