skrbl

http://skrbl.com

skrbl is an online collaboration tool.  Several people can edit the text on the page, upload pictures and upload files.  This is a free site.  I published a page at http://mypage.skrbl.com/LearnNCWeb2_0.html

To join the session and edit the page you use a different url, in this case, http://skrbl.com/56636643

This could be used to let students collaborate on a project or to distribute files, instructions, etc. to a group of students.