Sort of. You're thinking of this bike -- http://www.walmart.com/ip/700C-Men-s...-Bike/13398142

It's "fixed speed" (which seems to mean "single speed".) It's just a basic single speed bike (with two rim brakes, I might add, so it likely has acceptable braking), though you could convert it to fixed by making a trip to the bike shop and spending some money -- but you can't make it fixed out of the box. It didn't review too badly -- here's a reasonable review where they're not trying to be funny (like BSNYC was.)

http://urbanvelo.org/mongoose-cachet...-walmart-bike/