Older thread I know, but it has really heated up. Recently several other major riders, including George Hincapie and Levi Leipheimer admitted they doped in the past. Of course, not to defend them, but it got to the point where you felt like you had to dope just to keep up, it was so rampant. In baseball, if you're only one of 2-3 players on both teams that isn't doping, your performance will look a lot lower than the others, and you can't compete.
Armstrong has stepped down as Chairman of Livestrong, and Nike has severed their deal with Armstrong. They will continue their relationship with Livestong. Of course they could face other problems as well. Armstrong received bonuses for performance in race results. The USADA also says he testified under oath that he did not use performance enhancing drugs, so there's possible perjury as well.
Leipheimer has been dropped from the Quick Step team as well, due to his admitting to doping previously. I don't think it had been shown that he did this year while on the Quick Step team.
To say this is a huge mess is an understatement.