This Web 2.0 tool was introduced to me by a "Full Sailor" EMDT graduate on Facebook.  I tried it out and liked it so much that I bought the upgrade package.  It's called PowToon (click on the highlighted word for the link).
I created my first PowToon as an introduction for each class, to be used as a reminder of classroom behavioral expectations, but in a fun way.  Here it is below.  Check it out and have some fun!