Well, the fact that something went horribly wrong and my message got posted to the wrong thread has a lot to do with that. 
I meant that to go over here.
Interesting. I would say I have strong feelings to the opposite -- I think wikis are much better collaborative spaces than forums are.
Please consider, though, that even while you do development here, it would make a lot of sense to add Redcap links to your work-in-progress. Why wait until it's "done" before sharing it with the broader community? I think there is a big opportunity for cross-pollination here, with the wiki drawing people into the forum collaboration, and the forum discussions helping guide development and organization of the wiki.