Well..
I have to say that was just excellent. The story seems very well thought out, the animation and voices are almost spot on (At times Charlie Brown in this has a bit of an accent, though depending upon where you are from he would always have a bit of an accent, this just isn't his standard one).
The back-story was also well done and a definite bonus. I honestly preferred the style of the moving comic strip in chapter 3 over the remainder but that is just me, and the color cartoon is certainly nothing to be scoffed at. I definitely can't wait to see the next bit in the series. I hope for my own entertainment that the story continues on the current line, not rushing to an end but savoring the journey.
Overall great work, the only pseudo negative comment I have is that the flash doesn't resize well in Chrome, but I didn't try it in other browsers. Definitely a series to keep an eye on, though I am sure it will find it's way to the front page. 5/5 and 10/10 to all of the people involved in it, you guys are doing a great job, keep it up.