Soldato
I don't get why you'd really use media queries with a fluid design. If the design is properly fluid then surely you don't need break points it just keeps scaling?
Well, it's the best of both worlds, really.
You use breakpoints to get your device optimised layout and then the fluidity covers the devices that are inbetween your breakpoints.
As an example, this site uses breakpoints only.
http://foodsense.is/
While this one uses breakpoints with a fluid design.
http://forefathersgroup.com/