I am pretty excited about the 4.5 release. I noticed that:
http://www.openbsd.org/faq/faq15.html
has a linked titled "Packages for OpenBSD 4.5". The link is:
http://www.openbsd.org/4.5_packages/
It gives the message:
Not Found
The requested URL /4.5_packages/ was not found on this server.