Is there any themeroller application like jQuery UI Themeroller for Twitter Bootrap. It would be fun and easy to design and generate custom theme for Twitter Bootrap.
There are no themeroller-like sites for the bootstrap, but you can find certain premade themes on the internet such as the ones available in this site: http://bootswatch.com/. Of course, you can always make your own by using such tools as the Colorzilla Gradient editor and Colour Lovers to find matching colors that you might like.