It's not just about what APUG members can see--any member who subscribes should be able to see what is in the Soapbox--it's about what gets picked up on search engines and spread across the internet. We're pretty easygoing about what people can post on APUG, but if we allow unlimited speculation, then we're being irresponsible.
Paul, I suspect it's more likely an issue with the permission settings on the thread or the forum than your account, if you are able to access the Soapbox, but can't get to this particular thread. The thread doesn't seem to be deleted as far as I can tell. Sean would have to look into that.