So David Millar has made himself available for the road race and I assume, the Time Trial:
"I spent a lot of time thinking about it, but I've concluded that if I can be of benefit to the team, I would be happy to help."
I would link to the Times article this quote came from but is a subscription site.
Sounds like a change of heart from previous statements, when he said he didn't want to be some sort of 'cause celebre'
I expect Mr Cavendish is secretly very pleased.