Larry Wall writes:

>  PerlMonks has no problem displaying «», but I haven't a clue how to
>  type it into my browser yet.

If your browser is using Gnome then holding down Ctrl+Shift while typing
AB (for «) or BB (for ») might work.  (This is also working for me
typing this in 'Vim' in a 'Gnome Terminal', but isn't as nice as the
'Vim' digraphs.)

Smylers