Great trip report by renowned boulderer Lisa Rands. The shots of her bouldering the summit block of Thunderbolt and Starlight are really cool. From what I read, the summit register on Thunderbolt is placed in such a way that climbers must make the final difficult exposed move, which most use ropes to attain. Personally, I have such a fear of heights that merely looking at the photos made me woozy.
http://lisarands.com/?p=1408