Add me to the pro-Eberron camp. I'm a huge fan of Greyhawk, but I get my fix of that with Living Greyhawk. Forgotten Realms always struck me as a good setting for stories, but not one I generally want to game in.
I'm all for more Eberron specific advenures, and I'll put up with FR specific ones to get them. ;-) lol I think it's better to have some campaign specific adventures. They're not a lot harder to adapt than a generic adventure, and it's helpful to the DMs that run in that particular setting. As long as there's a good mix of the major settings, it should work out fine.
