Perl is OK only with symbolic characters. You can convert any Perl scripts into symbolic style scripts using Acme::EyeDrops. This module is awesome.
As for Ruby, Ruby 1.9 is perfect for symbolic programming. kurimura found the way to convert arbitrary Ruby scripts into symbolic format.
Unfortunately, I think Ruby 1.8's symbolic programming is very limited. For example, you cannot create a loop. As quine only require substitutions and outputs for stdout, which is doable with symbolic Ruby 1.8, my script can run with Ruby 1.8.
There are some other weird code like this: