VectorCatch,
Thanks for your very quick and helpful response to my posting. I was shocked when you stated: "TiVo has a big asterisk next to it saying it doesn't work for prime instant videos." So I went to the Amazon help page entitled : "Amazon Instant Video on TiVo", and sure enough, there is one sentence buried in a lengthy 'how to' page that says: "At this time, Prime instant videos are only available for streaming and cannot be viewed on a TiVo box."
Based on this, I sent an email complaint to Amazon indicating that I thought they were guilty of misleading advertising when they indicated on their web page promoting Amazon Prime that it can be used with a wide variety of set-top units, including TiVo. Soon after my emial was sent, a tech rep from Amazon called me (very quickly) to confirm that they currently can not stream videos via TiVo units, but "they are working on this issue". When I asked when they expected to have this issue resolved, he could not give me any estimate of time. Thus, the bottom line is that Amazon's Prime streaming service does NOT work with TiVo units. So buyer beware!
Neal