Only two remote holes in the default install, in a heck of a long time!The OpenBSD project produces a FREE, multi-platform 4.4BSD-based UNIX-like operating system. Our efforts emphasize portability, standardization, correctness, proactive security and integrated cryptography. OpenBSD supports binary emulation of most programs from SVR4 (Solaris), FreeBSD, Linux, BSD/OS, SunOS and HP-UX.
The current release is OpenBSD 4.6 which was released Oct 18, 2009. http://www.openbsd.org