I have to say I respect Riis for being the first person I know of who has now admitted doping when he didn't have to, but also for admitting he used it to win. While I don't think his win should be discounted (I mean, let's face it that everyone else was probably doped too) the lack of "I doped, but only in the races I didn't win" is a nice new reveal.
Update: Just to be clear, the new twist I was referring to is admitting he won a race on dope. Most riders who come clean claim they didn't use them to win anything. Although now that I think of it Millar did so I guess Riis is the 2nd.