It's not a bad idea really, but the play styles are different enough (single-player thief vs multi-player party that may or may not include a thief) that there's not going to be a lot of overlap potential in the storylines. So at that point all you've got to share is overall setting. That said, a forum section for discussing non-TDM uses of the setting to help keep them all consistent and reach consensus on what lore should get added to the wiki might be an interesting idea. Some world building from points of view other than a sneak-thief would probably help flesh out the world quite a bit. (Note that this post caught my eye mostly because I play quite a bit of low fantasy tabletop, so if there is a community here interested in expanding the lore via other game types I'd be happy to contribute, but there are probably few enough of us that we'd need to agree on where/how to collaborate.)