WikiWiki Spreadsheet and Wikis+DHTML

My buddy Michael Eakes found a cool open source WikiWiki DHTML spreedsheet that integrates into TikiWiki:

Something else that I just noticed about TikiWiki is that it creates some nifty DHTML popups when you run over someone's account name:

I'm a big fan of WikiWikis+DHTML, which I don't think have been used together that much, so its really cool to see how innovative TikiWiki has been in that regard.