Web 2.0 Tools

I'm finding that there are a wide variety of web based tools available to teachers for use with students.  I will definitely share Doink with the art teachers within my district.  I think the incorporation of an animation unit might be very interesting for the students.  Also, I think Sketchup has some strong possibilities for use in the classroom. Last school year I had offered a Google Earth staff development course that teachers showed strong interest in.  I'm toying with the idea of part 2 being Sketchup.