Sauce choices include gravy, Creamy Buffalo, Honey BBQ, Ranch, and Honey Mustard.
Apparently, the Original Recipe Bites have been doing quite well: KFC claims to have sold over 300 million of them.
The Bites plus gravy combo is being marketed as a "grown-up" combination. Here's an ad spot promoting the new combo:
As to why KFC's gravy is brown (I always though chicken gravy was a lighter shade), I put the question to KFC and they replied, "The Colonel made what was called “cracklin’ gravy,” which includes some bits of the chicken and breading. That is what gave it its brown color. So KFC gravy has always been brown." The more you know, right?
I also asked for the nutritional info for the gravy:
Calories - 50 (from Fat - 25)
Fat - 2.5g (Saturated Fat - 1g)
Sodium - 410mg
Carbs - 7g (Sugar - 0g)
Protein - 1g