[plt-scheme] Inadequate indentation facility in MrEd/DrScheme

In principle: I think you're right and we have discussed a meta- 
programming facility that would allow macro-defined languages (like  
the one for looping constructs) not only to specify a semantics but  
also IDE attributes such as indentation. We discussed this a year  
ago, when we moved to #lang and reader; I am certain that one year  
we'll add it in. (I don't know of any other language that provides  
such meta-programming facilities so this is a task with a research-y  
flavor.)

In detail: My answer has no relation to the specific details of your  
inquiry concerning for*

-- Matthias