Looks good, but I have to ask (and this is in no way trying to bring what you did down): is there a significant difference between this and templates like 960gs's? I've been using 960gs's template since Bootstrap was announced and adjusted the columns when they switched to 12cols...
The biggest difference is how Bootstrap does margins in their grid. The Row has a negative margin and the columns all have left margin only... The 12 column 960 grid is 60px with 10px left & right margin, so the spacing doesn't match up.