Reminds me a bit of that PrC... what was it... Soul of the City, or something?

Not ability-wise, but just the "so in tune with his city that he gets special powers."

Actually, that class had a capstone ability where you could either pick one specific city to focus your power on, and get some awesome power, or have your power apply to any city, but it's a slightly lesser power. That seems like something that would fit in here, if you wanted.

This post would be a lot more useful if I was less vauge...

Anyway, cool class.