Theo just posted to
misc@ that the official release of OpenBSD 4.6 will be pushed back to November 1:
http://marc.info/?l=openbsd-misc&m=125323117215354&w=2
November 1 has been the typical date for the fall even-numbered releases for most of the 3.x & 4.x series. The release of OpenBSD 4.6 had previously been announced to be October 1 due to the recent hackathon in Sweden.
...but you can still join in to share the love. Pre-order your copy of OpenBSD 4.6 today!