You should really look into Nu, the language I mentioned in my parent post. It is a "glue" language for Objective-C and allows you to write code using typical lisp prefix-notation (+ 1 2) or infix (1 + 2). Reason being ObjC is mostly object oriented with infix & named parameters, so it fits in both worlds.

For example, if you're typically a lisp guy, you would probably write code like this: (init (alloc ApplicationDelegate))

But if you're an ObjC person, you'd do this: ((ApplicationDelegate alloc) init))

And strangely, if you replaced the parentheses with normal square brackets, you'd be looking at syntactically correct ObjC code! In Nu you can mix and match your sexprs and algol-like notations as long as you know what you're doing. The finished code would be something a lisp developer and ObjC developer could both understand without knowing too much of the underlying details.