One of the things I think PBworks might be useful for is coordinating a study group.
Back when I was at HBS, it would have come in handy; the members of my group could have set up a wiki page for each case, and we could have collaborated together on the analysis. We could also upload spreadsheets for running the numbers, and the whole thing would be searchable (which would come in handy when cold-called!).
But that was a long time ago, and now that I'm an aged wreck of a man, I need the advice of current students.
Heck, for all I know, HBS now teaches everything via direct neural implant.
If you think you can help, or know someone who can, comment or email me. Thanks!