I have one game based in Eberron, and anyone who has read Sharn: City of Towers knows about the political machinations of that place! You can't swing a dead warforged without hitting a different political group.
So far I've had them deal with 4 Dragonmarked Houses, the Tyrants, the Boromar clan played off against Daask, agents of the former Cyre trying to incite a rebellion againt Thrane, The Emerald Claw into everything, and now a Rakshasa associated with the dreaming dark. Yeah, I guess I like political intrigue!
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Mission continues.