Absolutlely,
Currently my campaign is heavily influenced by Wee Jas, Cuthbert, Kord, Bahamut, Pelor, Nerull, Vecna, Erythnull and Farlaughnyn.
I would kill to see the Core/Greyhawk pantheon receive a full work up. To date what little has been written about the various faiths and religions barely amounts to a couple paragraphs. The really great thing about the GR gods is that they are mixed from several different racial origins (Suel, Baklunnish, Oeridian...).
In particular I would really like to see a full work-up on the faith of Wee Jas. But that's just me. I've made a Wee Jassian Paladin, Monk, and Cleric. The Paladin in particular gave a great twist on the conventional perceptions of Paladins.
What I'd REALLY like to see is Grayhawk done up to the degree that Forgotten Realms, Dragonlance, and now Ebberon have been done.
Jack