Nothing really new here -- the ESRB has been charging a nominal fee to get its saucy logos on your game for years upon years now -- but the discussion of fairness has recently surfaced with the introduction of Sony's UMD-less PSP Go . A few game developers are voicing concerns about the amount the ESRB charges (we're hearing around $2,500) in order for their titles to receive a rating, particularly when those very same titles don't have such a costly requirement in Apple's App Store . Subatomi