Index configuration form lacks description and order

There are two minor issues here. First, no descriptive text is visible on the index/bundle configuration form on the Default Index tab. It looks like there actually is some help text within apachesolr_index_config_form(), but it isn't displayed because it's done as:

$form['config']['bundles'] = array(
    '#type' => 'markup',
    '#markup' => t('Select the entity types and bundles that should be indexed.'),
  );

At least in D6, there is no #markup in the FAPI.

The other point of confusion is that the content types listed as options are not in any discernible order, which makes it difficult to scan and find the ones you're looking for.