OpenBSD 4.1 has been released:

We are pleased to announce the official release of OpenBSD 4.1. This is our 21st release on CD-ROM (and 22nd via FTP). We remain proud of OpenBSD’s record of ten years with only two remote holes in the default install. As in our previous releases, 4.1 provides significant improvements, including new features, in nearly all areas of the system

What’s new

=> Improved hardware support for USB and other devices

=> Install/Upgrade process changes

=> Over 4200 ports, 4000 pre-built packages (for i386), minor robustness improvements in package tools.

=> And many more
http://openbsd.org/41.html

Download OpenBSD 4.1

• Download OpenBSD from FTP server and mirrors