Thanks, guys. Ashu, there were no clouds in the sky at the time and it was sunset. I think I got annoyed by yet another cloudless day when I was out and about w/ my camera so I just googled "sky + clouds" and found something I thought might work. lol In the past, I've used a gradient on the sky to try to fake a polerizer, but I sometimes get an 'auro' around what I've masked off to shield from the gradient effect. I'll post something up if that doesn't make sense.
Mark, I never really noticed that before....or at least it never sunk in until now. I think you may have cursed me for life now! Arg!