Don't know if anyone's been poking around the wiki or not, but the Vis Sources page in particular needs quite a bit of work. Specifically, almost none of the entries in the "Harvested by whom?" column have been filled in and still have the "Example" default text in them.
I would like to see some discussion (either in-character, out-of-character, or both) on how the vis is going to be harvested. Some of them are pretty simple (the Roses of Eilean Chon or the Summer Rain are pretty easy and can be gathered by any of the magi who are around). Others require some planning and possibly sacrifice if not done right.