It's a shame most of the threads aren't available on the wayback machine. The only thread I could read was initally about Anthony refusing to post any more on TACC to "prove CookedHaggis wrong" and the thread steadily degenerating from there, including a cameo from a younger, more knobbish (and possibly power drunk), me. I can't get to any of the meaty stuff, like screenshot threads! The one from Chris Hill I couldn't access, but I do remember his stuff being awesome. He actually sent me a beta of one of his levels that was quite great... unfortunately lost a long time ago when my dad helpfully formatted my c:\ instead of my d:\ - I've recovered some of my own levels but it is an incident brought up again and again during conversation (like the time he took my first bike to the tip in 1989, long after I was able to ride it and it was broken, of course).
Was TACC hosted by Massassi near the end, or at some point? Would there be backups of the TACC forums located somewhere? Better yet, are they still available but inaccessible? Would it be possible to bring the forums back to life, if only in a locked state?
[edit:
http://waybackmachine.org/*/http://forums.commandchamber.net/* lets you see a list of all the pages. Just look for the ones with valid forum URLs (i.e. the ones without "editpost" in them).]