I spent the last five days learning how to best encode video for playback on the iPad, and during the day (when my kids didn't claims exclusive use of the device), actually uploaded and played the videos. Based on this rsearch, I've created a two part story; part I is encoding high def video for uploading to iTunes (or encoding your demo reels or movies for playback on the iPad), while part two discusses strategies for delivering via 3G and Wi-Fi. Here's a link to the first story