I don't ride singlespeed or fixed but I would like to someday so I've been checking out the forum. Anyways I just ordered a pair of Saucony Bullets because I need new shoes, they look sweet, and I found them on sale. I thought they might be something you guy would be interested in.
I also second the good things people have said about Sambas. I have a pair that is now worn out, but I worn them daily for a loooong time, and they served me very well. You can't go wrong.
Tom