World map overlays. Had to reposition the labels for Qeynos and Freeport slightly to avoid having to do one overlay for the green labels and one for the red labels, but other than that the label positioning is unchanged from the original.
New optional area map icons coming shortly.
As for the anti-aliasing, it's actually relatively simple to do. Create the image as you want it to appear using Photoshop's integral antialiasing. Copy non-transparent portions to a new document with a black background. Do a color replacement for each color, first setting Lightness to +100, then again setting it to -(100 - desired_transparancy_percent). Flatten the resulting image and copy it into the alpha channel of the final image. "Clean up" photoshop's anti-aliasing in the final image by selecting all transparent areas, inverting selection, and flood filling with whatever the apropriate solid color is. Okay…it sounds a lot harder than it is when it's spelled out like that, but it's really not too tough.
(You may have known how to do it already, but I assume since I didn't there are others that didn't, so I figure I'll share the love)