I just noticed that if you go to openbsd.org rather than www.openbsd.org, you get the old home page, indicating 4.5 as the current release. www.openbsd.org returns the new home page, with 4.6 as the current release. I don't know if this is intentional (I suspect not), but thought I'd mention it.
I've been running 4.6 snapshots on an older test machine (a Thinkpad 600x on which 4.5 would not run properly). Looks great. OpenBSD makes Linux look like an amateur show. It's difficult to believe that this secure, stable, elegant, well-documented system is the descendent of 4.1BSD, which drove so many of us mad on VAXen 25 years ago ("it was hard to build, it ought to be hard to use"). Congratulations to Theo and the development team. You will continue to have my support, moral and financial. /Don Allen