I have a friend that uses pbase as well. Him and I go to the same events a lot and take similar pictures only he has one perspective and I have another. It would be nice if we could have a friends/buddy list on our pbase similar to favorite artist list but viewable to the public. The friends list could be in the profile. Kind of like how people have a friends list on livejournal if you've ever used that.
It would also be nice if we could link galleries. There could be a box in the gallery where it says (view similar galleries) with a list of usernames who have a similar gallery. Clicking on their name would take you to their similar gallery. Kind of an interpbase hyperlink system.
When you add or edit a gallery there could be a text field box where you submit the url's of similar galleries. They show up in your gallery as the persons username in a box under "view similar galleries". or "These artist have similar galleries".