No, this isn't another "Sendmail needs to be replaced because there was a security hole" email. I was following the thread on BugTraq regarding the Sendmail vulnerability, and saw this from Theo (Mar 24 2006):
"Luckily within a few months you will be able to tell Sendmail how to disclose their bugs because their next version is going to come out with a much more commercial licence. Then you can pay for it, and then you can complain too." Is this a hint that there might be a license issues that would cause problems with OpenBSD, or am I reading too much into that statement? -- Will