Sorry for the late reply!

2011/2/14 Иван Бессарабов <ivan@bessarabov.ru>
For what I know the dancer has no user friendly way of using config
values outside dancer webapp.

Sure it does!
 
I hope that somebody will write code that will solve this small issue
(as we know there is a great myth about dancer, that one should only
suggest plugin in the mail list and sooner or later the code will be
on cpan =).

I would if it didn't already exist. :)

All you need to do is:
use Dancer::Config 'setting';

my $template = setting('template');
my $layout = setting('layout');
my $extra = setting('MySettings');

Hope this helps!
Sawyer.