Social Login icons as a Block

I want to second this, would really like this feature as well.

Ad these lines to the end of rpx_widgets.module file.

It practically takes the code from _rpx_user_login_form_alter() and embed it into a block named "RPX Block Icons".

/**
 * Implements hook_block_info().
 *
 * This hook declares what blocks are provided by the module.
 */
function rpx_widgets_block_info() {

  $blocks['rpx_block_icons'] = array(
    'info' => t('RPX Block Icons'),
    'status' => TRUE,
    'region' => 'sidebar_first',  // Not usually provided.
  );

  return $blocks;
}


/**
 * Implements hook_block_view().
 *
 * This hook generates the contents of the blocks themselves.
 */
function rpx_widgets_block_view($delta = '') {
  //The $delta parameter tells us which block is being requested.
    $block = array();
  switch ($delta) {
    case 'rpx_block_icons':
      $block['subject'] = t('RPX Block Icons');
      $block['content'] = _rpx_widgets_create_block();
      break;
  }
  return $block;
}



function _rpx_widgets_create_block () {
  rpx_js();
  $items = array();
  $realm = variable_get('rpx_realm', '');
  $realm_scheme = variable_get('rpx_realm_scheme', 'http');
  $sign_in_url = "$realm_scheme://$realm/openid/v2/signin";
  $token_url = _rpx_token_url();
  $providers = _rpx_providers();

  // These options are common for all providers.
  $options_template = array(
    'query' => array('token_url' => $token_url),
    'html' => TRUE,
    'attributes' => array(
      'class' => 'rpxnow',
      'onclick' => 'return false;',
      'onmousedown' => 'delete RPXNOW.default_provider;',
    ),
  );

  $icons = '';
  foreach ($providers as $provider_name => $provider_title) {
    $options = $options_template;
    // If it's the first Engage sign-in for the user, this will take them
    // directly to the provider's dialog.
    // @see https://rpxnow.com/docs#sign-in_default_provider
    $options['attributes']['onmousedown'] = "RPXNOW.default_provider = '" . $provider_name . "';";
    $icons .= l(theme('rpx_icon', array('provider' => $provider_name, 'size' => variable_get('rpx_login_icons_size', 'small'))), $sign_in_url, $options);
  }
  $items[] = array(
    'data' => l((variable_get('rpx_signin_string', RPX_SIGNIN_STRING) == '') ? RPX_SIGNIN_STRING : variable_get('rpx_signin_string', RPX_SIGNIN_STRING), $sign_in_url, $options_template) . '<br />' . $icons,
    'class' => array ('rpx-link'),
  );

  $form['rpx_links'] = array(
    '#theme' => 'item_list',
    '#items' => $items,
    '#attributes' => array('class' => array('rpx-links')),
    '#weight' => variable_get('rpx_login_links_weight', 150),
  );

  return $form;    
}

This works for me, but the icons are so TINY. As a workaround I'm using a block with custom PHP that just uses the Engage widgets from their website (script with div). This module really needs some work in terms of block building / ui flexibility. Something like a function that accepts a few arguments and returns some basic html that developers can style with CSS would be just fine with me. Drop that in a block with PHP input style and customize it any way you want.

It will be really cool if login_form_alter was turned into a separate block as it was done in the code example by Necropsique.
login_form_alter should be done by developers outside the module.

Code above seems to work fine for us.

I don't know where the above code comes from because I can't find it or the original function ( _rpx_user_login_form_alter() ) in module.
Maybe this was D6?

Anyway, all you need is this code to be put in a custom block or render with the block callback

<?php
rpx_js();
?>
<div class="foo" id ="janrainEngageEmbed"></div>

Just a note, you can only have one "janrainEngageEmbed" ID per page, otherwise nothing shows. So, if you have normal login as well, make sure you disable Jainrain for it in settings.

@Necropsique - I would suggest posting a patch so its easier for the maintainer to commit your code and people will be able to test it out.