Conversion of 6.x node edit forms to 7.0

I have a number of custom modules developed for a client in 6.x. The most recent enhancements require the use of jQuery 1.4 and jQueryUI 1.8. The existing modules make use of 6.x AHAH, which appears to not be compatible with jQuery 1.4. Thus a migration to 7.x core.

I am having problems converting even the simplest part of the system to 7.0's new form system and could use some help. Here is one working 6.x hook_form -

function workshop_description_form($form, &$form_state, $node) {
 
  $type = node_get_types('type', $node);
    if ($type->has_title) {
    $form['title'] = array(
      '#type' => 'textfield',
      '#title' => check_plain($type->title_label),
      '#required' => TRUE,
      '#default_value' => $node->title,
      '#weight' => -5
    );
  }

  if ($type->has_body) {
    $form['body_field'] = node_body_field($node, $type->body_label, $type->min_word_count);
  }
  
  $form['workshop_short_description'] = array(
    '#type' => 'textarea',
    '#title' => t('Workshop Short Description'),
	'#rows' => 5,
    '#default_value' => isset($node->workshop_short_description) ? $node->workshop_short_description : '',
    '#text_format' => isset($edit->format) ? $edit->format : FILTER_FORMAT_DEFAULT,
	'#required' => TRUE,
  );

  $form['workshop_code'] = array(
    '#type' => 'textfield',
    '#title' => t('Workshop Code'),
    '#default_value' => isset($node->workshop_code) ? $node->workshop_code : '',
    '#size' => 5,
    '#maxlength' => 5,
	'#required' => TRUE,
  );

  $form['workshop_bgcolor'] = array(
    '#type' => 'select',
	'#title' => t('Workshop Calendar Background Color'),
	'#default_value' => isset($node->workshop_bgcolor) ? $node->workshop_bgcolor : '#FAF8AC',
	'#required' => TRUE,
	'#options' => array(
	  '#FAF8AC' => t('yellow'),
	  '#B6DDE8'=>t('blue'), 
	  '#99FF99'=>t('green'),
	  '#FCD5B4'=>t('pink'),
    ),
  );	  

  return $form;
}

This was the simplest and I expected the easiest to convert, but it is not working. Suggestions, or pointer to a node edit form example would be greatly appreciated.

Thanks,
Tim