Sun boasts their UltraSparc III as an "open" architecture, yet seem to recognize that there is insufficient information freely available for the open source community to support it with operating systems. I have been told that the required documentation does exist, however, with a Sun part number of 805-0408-05-P. An early version of this manual was allegedly made available to Linux developers once a Confidential Disclosure Agreement was signed (Sun's version of a Non-Disclosure Agreement), however no such offer has been made to the OpenBSD team, an offer that if made is likely counter to the project's goals.
I attempted to discuss this issue with Danese Cooper who works in Sun's Open Source Programs Office, with as of yet limited results. My goal is to gain a clear understanding of Sun's official position on this situation, something that to date they seem unwilling to discuss with me. My continued attempts to get direct answers are described here.