You'd love Haskell, which uses curly braces for many constructs, but also has rules by which they are implied by indentation -- so in practice you only ever see them on records.
I love python syntax overall, absolutely despise Haskell. Wastes my time constantly and gives me incomprehensible compiler errors when you screw it up. Expression oriented languages are really poorly suited for whitespace imo, unless they're hyper-regular like s-expressions: I could imagine a decent whitespace-based version of those.
