Doesn't mean you can't use it. ;3
Still, nice.
The OpenGL tutorials I'm writing use SDL 1.2 as the windowing system (I'd have gone with 2.0, but my Mac doesn't even
support OpenGL 3, so it'd be pointless). You should take a look at them as they start coming out (working on finishing up the first right now). :3
Just as a note, though - if you're using SDL_image for loading the PNGs, you shouldn't have to worry about setting a color key. If I recall correctly, it'll automatically use the alpha transparency in the PNG file (don't quote me on this, though - I haven't actually used SDL for
rendering in ages).