Small anecdotes about the machines would be a very interesting idea -- One possibility is to use the talk area of any given machine's page to talk about it. For longer comments, user-space or sub-pages would be a good idea.

i.e. make a link to a subpage for an anecdote or user story, such as this: http://68kmla.org/wiki/Macintosh_Quadra_840AV/anecdote1

(note that I haven't actually created the link, I Just typed the slash and anecdote1 after the 840AV bit, but you would be able to create the link pretty easily.)