[nailer]

Indentation is logic. Repeating logic is one of the greatest evils one can commit. http://en.wikipedia.org/wiki/Dont_repeat_yourself

Re: parsing, read each line, if the indent is greater than the current indentlevel, add line to a new block, else, add line to existing block.

Tabs were considered harmful before Python, they're still considered harmful now.

You could add braces to Python quite easily, I think this has already been done in jest a few times...