The OpenBSD/vax port is currently being worked on. The code has been recently imported into the OpenBSD tree based on work from the NetBSD/vax port.
OpenBSD currently supports these vax models:
Along with support for the VS3100 ncr5380 scsi driver.
Projects being worked on:
The OpenBSD/vax port has not seen a formal release, however snapshots will be made from time to time.
The OpenBSD/vax port maintainer is Brandon Creighton.