My laptop screen claims to be visible in direct sunlight, but it is just barely. You would be surprised the amount of automatic adjustment your eyes make between indoor and outdoor light without you realizing it... Sunlight is incredibly bright, you will not find a backlit design which will still be visible in direct sunlight (have you ever tried to watch a TV in direct sunlight?)
The only ones that you will find are those reflective ones. They pass light through a special screen on the top of the display, through the LCD matrix, reflect it off of the bottom of the screen, and back through again (incidentally this is more efficient than a single backlight -- the light passes through the matrix twice)... However as someone else mentioned these are very expensive and good luck finding on with a decent size. What size are you looking for?
Even my Ipaq screen (reflective) isn't great in direct sunlight. It's a lot better than my laptop, but still not great.
My old Epson digital camera (850Z) has a great system. It has a flip-down top that would allow sunlight to actually reflect through the back of the LCD (acting like a backlight)... That system worked awesome and you could so easily see the LCD in superbright sunlight, it was an excellent system. I haven't seen anything like that for LCDs > 1.5" thou