David, I was just thinking of the written side of it - people e-mailing their experiences (regarding the portfolio! to be added to the travelling Portfolio page, if deemed interesting.. Maybe there won't be anything although I found the inital description of yours decribing setting it up and the 1st couple of prints going in interesting. Also keeping that page up todate as to the portfolios progress. I do like your idea of including a camera in the traveling portfolio (if it would fit). Once it gets to me I'll access the situation and if it looks like there's room, I'll drop a disposable in.
Also, just how thick is the box... have you mounted your prints (those with prints in it already)?