Thanks Barb! Yes - she's quite a mover! She hasn't wanted to play with toys really since I got her - but she loves to chase that ball as you can see! I'm so lucky - there is a disused field right near where we live with a sandy surface - perfect for letting the hound do her turbo-charged running!
To post the video as the signature -- that was a bit compicated! It's actually an animated GIF file. You might be able to make one from your camera/video software (obviously much lower quality than a "real" video file).
To do mine I imported the movie file into Macromedia Flash (which I have from "techie" days), where you can reduce the file size and then save the movie as an animated GIF file - then just reference it like you would a normal picture from a free-photo hosting site. You need to make it a small file or it will take ages to appear. Hope that made sense!