It's kind of a thematic coincidence. Most of the submissions for the SF logo tried to capture (in some way) a rack of servers with one or a few misbehaving.
This also aligns with concepts of 'stacks', as racks are organized stacks of servers (well, sometimes they're organized).
I remember when the contest was launched, because I was eagerly awaiting concepts that deviated from that design concept - mostly because I couldn't imagine how you could do that and come up with a logo that very clearly represented what the site was all about. I was hoping someone else (with beefy design chops) could come up with something.
Folks did come up with some great ideas, like the BSOD-ish gray-on-blue monospace, stuff incorporating flames, and even some figlet inspired stuff, but the ultimate call on a winner was up to Jeff. I can't imagine that the similarities in theme wasn't a factor in his decision, it does work brilliantly well.
Thanks for the nostalgia :)