wikis or website?

I've been looking at the wiki information trying to figure out how/why I would or could use it in my classroom. I've used the curriki site for a few years as a supplement to my class when I didn't have a textbook. I used this site http://www.curriki.org. It was developed by a guy who wanted to help schools have up to date information in the form of labs, experiments, demos and coursework. Much of the original stuff was not to good but there were some professional parts that, thought buggy, my students really liked. I used the NROC stuff for AP physics. It was great that it would read and show you the lesson and then have check questions that you had to answer correctly before you could go farther. It was hard but even my ELL students found it nice that you could go back through it as many times as you needed.

I have a class web page that has on it everything that I see people putting on their class wikis and I'm not sure why one would be any better than the other. I like the control I have on our class website to post what I want and take things down when needed. I guess I'll have to look into wikis a little deeper to see what I'm missing.