sorry, I think adding references to screenshots is going to be way too much work for the limited number of porters we have to handle - it's tricky enough to handle regular updates and helping new people learn the ropes; handling diffs and commits to get this into the ports tree will take a lot of our time (and even then, will be a lot of work to get anything approaching good coverage of the ports tree)
it is the sort of things someone could build externally if they wanted, keyed on pkgpath ..