I think the post with the link to how Al Petrofsky implemented a loop macro with syntax-rules was the most interesting thing in that discussion.

http://groups.google.com/group/comp.lang.scheme/msg/5438d13d...

I'm definitely going to need a lot more free time before I'll be able to fully understand how it works.

"...we're going to keep acting as if we were the only users..."

The shortcut to excellence by avoiding the "lowest common denominator syndrome".