Online Drawing Tools

I found this great list of online drawing tools, when considering options for a kindergarten solar system project.  These sites provide an interesting way for students to create and share art work.  Some of the tools are easier to use than Microsoft Paint and others are much more complicated.  Most of these sites use Flash and would require saving the artwork online, which was not my original intent.  However, it would be easy to embed links to student art work within a web page, blog or wiki.  These drawing tools could be used to have students draw a non-linguistic representation of a BAV word.

Have any of you used online drawing tools with your students?