This site will help user create correct citations for bibliography pages. The user simply inserts the information and EasyBib will create the citation. This is great for student or writer to use for correct work cited pages.
I am a little iffy about this site being interactive enough to be considered 2.0, but if you are teaching writing to older students, it is pretty nice. There are bibliography makers and tutorials so... I hope it is considered a 2.0 Web site :-)