If you would like to add some extra info to the 'Contact Us' page, such as an address, or a phone number, then the following mod will be of help.

Edit contact.php

Search for

'submit' => array(
'type' => 'submit',
'name' => 'do_submit',
'value' => _t('_Submit'),

Then add underneath

'address' => array(
'type' => 'value',
'caption' => 'Postal Address',
'value' => 'DeeEmm Web Technologies. PO Box 2105, Hilton Plaza, Adelaide, SA 5033',

Obviously you will need to change the details to suit your site.