Hi Paul,
The EasyBlog Custom Profile Field data is not stored in EasySocial hence I was advised by the Stackideas team to use the below code in case you are trying to display the data through the use of a Unique Key...
<?php require_once(JPATH_ROOT . '/components/com_easyblog/helpers/helper.php');
$eb = EasyBlogHelper::getTable('UNIQUE KEY');
$eb->load($user->id);
echo $eb->getBiography();
?>
I am hoping though that in the future we would be able to easily display the data in ES!!
Cheers
Avinash