This, of course, would be a follow-up to his Sunday keynote here, which went awry when the audience.
I don't have a lot of details, and apparently the open Q-and-A may be going on right now, though Scoble Twittered that he thought it would be at 4:30 p.m. local time.
But for Zuckerberg to make this move would surely go over huge here at SXSWi, where the talk since the keynote Sunday has been about almost nothing but the "train wreck" that was the on-stage discussion.
UPDATE (12:22 PM PDT): Kind of, but not quite. Facebook has planned to hold one of its "Developer Garage" events in conjunction with SXSWi for some time now, and representatives from the company announced on Monday that Zuckerberg would indeed be speaking at the get-together.
It will also, as reported, be at 4:30 PM Central time, but it won't be a massive event. Priority admission, according to Facebook representatives, will be given to those who have already responded to the Developer Garage.
(Editors' note, 1:10 PM PDT: Earlier Monday, Zuckerberg chatted one-on-one with CNET News.com's Caroline McCarthy. An account of that conversation is posted here: ".")
See more stories in CNET News.com's coverage of SXSWi (click here).