Scarred Lands and if you guys had MY SL DM's Screen, you'd agree.
WotC's, quite frankly, sucks. Oh and I have both. Far as I'm concerned, this screen is less flimsy, easier to read AND will stand up to the beating I gave the WotC. Not mention the compainion book ROCKS.
Okay, okay, so I haven't been able to actually play it (my players are mired in FR) but I would love to give it a whirl. The One Source has got to be one of the best concepts for magic... AND it looks like WOTC did a fantastic job of describing it in d20 terms.
Oh, and Arcady, don't be angry: this one is for the favorite campaign setting, the other is for the best campaign setting. One can prefer a setting that he acknowledge is not the best technically, but has other qualities, like nostalgic appeal (some people talked about Mystara) or is your baby (homebrew) so you love it even if it's not the best.