This article is from late June and gives some interesting details on the nature of the USADA.
Travis Tygart Plays Prosecutor, Jury and Judge in Lance Armstrong Case
This one from a few days ago is openly conspiratorial and suggests the cancer and pharma industries may not be happy with the success of Armstrongs organization (livestrong.org) and with a new book coming up.
I am not familiar enough with livestrong.org to comment on its impact or its potential to bother those industries, but I certainly would not put any thing past the pharmaceutical industry. During the swine flu scare I watched an astonishing documentary about the history of this industry: http://www.youtube.com/watch?v=vxyVK3pAiQQ