I would advise against the 'less-rails-bootstrap', 'compass-bootstrap' gems and whatnot (there's a whole bunch of them). I tried a few of them before resorting to embedding bootstrap as plain less. The gems did either not work at all for me or did not support 2.0-wip, and none had a clear upgrade-path (the sass-compiler chokes on 2.0). Generally I've become strongly biased against the practice of bundling CSS/JS-libr…
If you use scss/sass instead of less, try https://github.com/thomas-mcdonald/bootstrap-sass/tree/2.0