On: Can a language have Lisp's powerful macros without the parentheses?

See the Io programming language:

"Io is a small, prototype-based programming language. The ideas in Io are mostly inspired by Smalltalk (all values are objects), Self (prototype-based), NewtonScript (differential inheritance), Act1 (actors and futures for concurrency), LISP (code is a runtime inspectable/modifiable tree) and Lua (small, embeddable)."

http://iolanguage.com/

Thanks for the link. It looks pretty interesting; I'm installing it right now to play around with at some point.