So far the main value in these hacks has been to gain a better understanding of why Lisp syntax is so nice, imho. Also they can show really clearly what people mean when they say the parentheses are invisible, by actually removing them.
Another example. I was playing with the Luhn algorithm. I wanted to use the Python implementation. Alas, when I copied and pasted from the webpage (there was no file to download) indentation was not preserved, and Python didn't accept the script (nor did it what to reident the code). The Scheme version worked just find, of course. And DrScheme idented it perfectly.