I was in the process of downloading the new Halo 3 maps when I saw an ad for Voltron: Defender of the Universe cartoon.  Turns out the first two seasons are now available on Xbox Live Marketplace and the first episode is free.  Yes, I did download it and watch it before I jumped online and played the new maps.  It's only available in SD but still looks good at 480p.  I'm not going to be buying all the episodes but it was really cool to watch a cartoon from when I was a kid.