> Apparently, the dark plastic, squarish, 'geek' look is big these days... but somehow, I think something like that would take me out of the 'nerd-cool' area into the realm of the simply 'nerd'.
Sorry to burst your bubble, but your current glasses aren't exactly making you look more "nerd-cool" than "nerd". Rectangular frames, thin rimmed or thick, would suit you better. I'm skeptical of rimless because your lenses are thick, and that's not really flattering. Metal black frames if you don't want that mainstream geek look.