After going through a bit of a nightmare with the TiVo site - as there are THREE separate places to submit custom RSS feeds to TiVo - AND NONE OF THEM WORK...
I finally got the true method for getting them added from a TiVo employee. Here's what he told me:
I forwarded your feedback and they will submit the request but they also showed me the process for submitting requests on the website.
Scroll down to section: “Web Videos, Podcasts, App Stores and News”
Click on Hotlist icon – below is the text for submitting feeds to us:
Hotlist brings great internet video right to your TV with channels like A&E, TMZ, TV Guide and more! Want your channel on Hotlist for TiVo? Drop us a note at email@example.com<mailto:firstname.lastname@example.org>
Basically, the end result of that is to tell you to email this address: email@example.com
I can say it does work - I submitted two of them, and they showed up two or three days later on my TiVo. I was initially concerned that it would show up on the Hotlist app, which I was totally NOT interested in. But submitting to this email address DID work.
That their site is such a mess that they still have all these old non functional "Add an RSS feed" links speaks to how disorganized their site is. I sent them a nastygram about that, which I'm sure someone read, and got deleted, but hey. To their credit, the guy who told me about the procedure above did say the following, but AFAIK, it hasn't changed anything.
This seems a little buried in our website so I've asked that we make it more visible.
As a point of reference, here's what I sent them when I last asked for something to be added:
I'm writing to you guys to submit a few video podcasts to appear on the TiVo search. I was told this was the email address to do this. While you may use it for the Hotlist app, I'm wanting these to show up in the standard TiVo search with all the other programs and video podcasts there. Here are my requests:
1) "The New Show" (from Revision 3)
RSS Link: http://revision3.com/thenewshow/feed/mp4-hd30/
2) "TestTube Daily Show" (from TestTube)
RSS Link: http://testtube.com/testtubedailyshow/feed/mp4-hd30/