I did my midterm choice project in wikispaces and had a terrible time keeping the formatting, being consistent with font sizes, etc. I liked that I could add some color and design elements to wikispaces. If you look at my midterm project, you will see that my fonts sizes are wacky and there are even ****that appeared around the links to the book pages.
Are there other places to build a wiki that you love?
Is pbworks easier to work with?
Can I add text boxes or cut and paste from word?
I will experiment more when I have time but would appreciate your comments or suggestions.