Kudos to Maestro, who passed along this bit of forewarning about one last Halo preview in the final, June 2000 issue of PC Accelerator:
PCXL, in their final print issue, have a Nine Hot Games feature, among which of course is Halo. There are no new screenshots, but it's a decent recap of everything, and it includes a short Q&A with Joe Staten.
Now, we're not really sure if this is new news, or old news, but it didn't show up in the archive, so what the heck. Cookies for the first fellow to transcribe and post that sucker!