how would you do the equivalent of print $hash{bang}; in Perl 6? print %hash{bang};?

Exactly. In Perl 6 the sigils for arrays (@) and hashes (%) are an intrinsic part of the variable name and consequently don't change when the variable is accessed.

Maybe I should start reading the Apocolypses or something...

Good idea. They're most easily accessed at: http://dev.perl.org/perl6/apocalypse/.

The Exegeses and Synopses are also quite useful.