With 15 pixels and two colors to work with, you only have so much possibility for stylization... 2^15 is 32768 if I remember my twos table right.
I suppose I should also comment on the art, lol. For the most part it's very good, but the D looks like a 0 or an O without the context and that should be avoided at all costs. The J and O are also a bit funny, the O because of the differentiation to make it non-identical to the D, and the J looks too much like a backward C--one pixel off the top line should do it. The N is also very M-looking. N is a very hard letter to do in small horizontal space, but giving it a look like a larger lowercase n usually works in a pinch. The only other letter with a "problem" is the Q, which just looks a bit funny to me; it's not indistinct and it does make sense to be a Q upon further inspection.
B8 thats all im saying.. oh and maybe a bit of D0
i'm sure you understand me...
With 3x5 pixels, I think some better distinction and legibility could be achieved. A quick something, not really sure if it is better:
http://img.photobucket.com/albums/v157/pembroke/pixeljoint/chess_fonts.gif
its correct... i dont know its a font... dont know what evaluate..