Mine is 6016/768 DSL and so far it's been perfect with a Roku box even with other applications using the connection. Considering that the TiVo offering just went live last week I'm sure there are a couple of bugs to work out. The Roku unit has been flawless.
Have you wasted a day on YouTube with your TiVo yet? -- Toolmaster of La Grange.
YouTube on Tivo is only valuable for showing a group of people something on the big screen - and then only if you absolutely know what search query to use. Surfing/browsing YouTube is too cumbersome.
I wish Tivo would enable USB keyboard support - it would make things like YouTube and everything else much easier to use.