Creating Mashups with DekiWiki

I've been looking at lots of wikis today to determine which one we want to user for managing our technical architecture process and projects. I've looked closely at about a dozen. So far, Deki Wiki looks very good, although for a hosted service, I still really like WikiSpaces. You can see from this video how easy it is to embed content and create mashups within the wiki, which is something I really want to do. In the process of doing this, I came across Viddler. What I really like about Viddler is the ability to tag video content, including the ability to post video responses to the tagged location in the original video.