Lovely list. We used Twitter Bootstrap to build our ClickDesk website – http://www.clickdesk.com/
We blogged about it here – http://blog.clickdesk.com/why-did-clickdesk-choose-twitter-bootstrap/
For a first try, I did http://www.lunettessoleil.org/ with Bootstrap. I’ve been amazed by the easiness to get into the code.
Another nice example is ByFuss that was built with Bootstrap, has fixed and fluid rows with a nice responsive behavior.
This all new Twitter Bootstrap technology is the best HTML and CSS-based design templates can offer to start-ups and brands.