Two days ago Claudio Jeker comitted the new ospfd in OpenBSD. It's still not complete and not connected to the build, but it's there now for everyone to see.

With time it will be as closely integrated with pf(4) as bgpd(8) is. It fits in nicely with the rest of the OS where it formerly only had a the RIP routed(8). People have already started asking for an IS-IS daemon, but there's not much interest from the developers as far as I can see.