Given perl6's use of unicode as a basis, could we get "curly quotes", both single and double, to do the same things that straight quotes do? That is: "text" does the same thing as "text", and 'text' does the same thing as 'text'. Other than "looks neat", why do this? Because curly-quotes come in matching sets, like parentheses and brackets do; this lets you nest them.
(This seems so simple and obvious that I'll be surprised if someone hasn't already proposed this; however, I don't recall seeing it anywhere.) -- Jonathan "Dataweaver" Lang