<?php

function custom_giggity_block_info(){
  $block['custom_giggity'] = array(
    'info' => t('Custom giggity'),
    'cache' => DRUPAL_NO_CACHE,
  );
  return $block;
}

function custom_giggity_block_view($delta = ''){
  $block = array();
  if($delta == 'custom_giggity'){
    $block['content'] = custom_giggity_contents($delta);
  }
  return $block;
}

function custom_giggity_contents($delta){
  //Code that generates what goes into $block['content']
  return $output;
}

function giggity_contents() {
  $items['giggity'] = array(
    'title' => "Giggity",
    'page callback' => "show_giggity", //or custom_giggity_contents ;)
    'access arguments' => array('access content'),
    'file' => 'giggity.inc',
    'type' => MENU_CALLBACK
  );
  return $items;
}