Sorry to revive, but why create a new thread when already exists?
I would like to see the "nofollow" tag too. It should not be associated with a wiki imo, but with a link only, and I think that's the only way it would work anyway.
using html a usual link would appear as:
<a href="http://pbbg.wikidot.com/">PBBG List</a>
Using the nofollow code it looks like this:
<a href="http://pbbg.wikidot.com/" rel="nofollow">PBBG List</a>
So wiki format could probably use the same tag or whatever it's called. Of course I have no PR atm, but I have a huge list that I'm scared to use links with in fear that I will destroy any chance of PR that I might have.