Best way to plot grid point values on a map?

Hi list,

what's the best (meaning most efficient/fastest) way to plot grid point values on a map created with basemap?

I'd like to plot the raw values of my data-array to the correspondig gridpoints, instead of having it transformed to something like contour or contourf. The ne plus ultra would be the ability to assing a colormap, to control the font color of the plotted values...

Regards
Simon