One of the main reasons that people create a portfolio here is for people to comment on them and critique them. I think it would make sense then to implement a way for the viewers to leave comments for the portfolio that they just viewed. Something like the "devious comments" system they have at www.deviantart.com would work great. Anyways, I'm just throwing an idea out there. I have no idea how difficult it would be to actually create such a system based on the current software, so I'm not holding out much hope.