With a 67th place finish in the Tour Down Under and "disgruntled ex-employee" / ex- personal assistant Mike Anderson's allegations in a recent Sports Illustrated Article, I'd say the following;
Lance, it's time to come clean. Your efforts to draw awareness and raise immense amounts of money to fight cancer will be remembered as more noble and heroic than anything you've done on the bike. We will forgive you, but you've got to give us something here to close out the ongoing investigation.
As an eternal optimist, I will interpret Lance's most recent tweet as an indication that he will in fact step up in the next few days and tell us he is sorry.
"THAT'S it!" (Lance Armstrong tweet January 23, 2011)