Visit this website to see the Stingray color options. There are three shades of black, but they are all distinctively named. "Black" is plain old gloss black. "Stealth" is matte finish black. "Sapphire black" is a deep charcoal with a subtle metallic sparkle, and my favorite of the three. MF should be using the correct names:
http://www.music-man.com/instruments.../stingray.html
BTW, they play freakin GREAT. I've heard of people not liking Stingrays, but man, if you dig that in-yo-face tone it's very easy to dial in on one of these. Having said that, you can get much more standard tones out of it as well (especially if you select a multi-pickup configuration).
Enjoy your new toy!
On edit: You're right, the pictures at the MF link you provided are wrong. The one that's labeled "Black, maple fretboard" is in fact a picture of the Sapphire black. The one labeled "Black, rosewood fretboard" shows the basic gloss black. As long as you pick the correct color name from the drop-down selection box, you'll get the one you prefer.