Unbox rentals, as hinted by the latest survey sent to customers. Respondents were asked to prioritize several interesting potential features, including HD downloads, instant streaming of DVDs ordered from Amazon, ad-supported free streaming, and the ability to browse your entire Unbox purchase history from a TiVo. Actually, several questions focused on the TiVo and other media streamers -- it looks like Amazon's at least considering developing the TiVo as its answer to the Apple TV and Xbox 360. Of course, if that's the case then HD downloads need to happen yesterday, since Unbox already way behind iTunes and Xbox Live Video Marketplace in that regard -- and with the possibility of Netflix coming to the 360 and PS3, it stands to fall even farther back. We'll see how this plays out -- hopefully the high-def download scene is about to blow up.