RLV News is a good place to go for White Knight 2 rollout, and planned Rocket Racer rollout, news and links, which I've only skimmed over so far.
WhiteKnightTwo rolls out
Mothership "Eve" Roll Out [Update]
Virgin America and Virgin Galactic working together
WhiteKnightTwo rollout [Update]
XCOR X-Racer prepares for Tuesday debut
More WK2 rollout response
WK2 rollout impressions and pictures; SS2 accident report