Amazon HD video on demand released for HD TiVos, Roku players

It looks like Amazon just added HD-quality video to their video on demand offerings, releasing the feature to both high-def TiVos and the Roku set top box player (they also offer it for Sony and Panasonic connected TVs).

Amazon seems to be charging about a dollar more for HD over standard definition content (HD shows look to run $2.99/episode instead of $1.99, HD movies are $4.99 per rental instead of $3.99) and strangely enough the Amazon site is telling me I have to go to my TiVo to browse and rent movies, since they can't offer HD movie playback through a browser (likely a licensing issue with the movie studios).