I was looking for a way to remove formating from around a drupal block. The easiest way was to hack the block.tpl.php file for my theme as follows:
<?php if($block->subject == "nostyle") { print $block->content; } else { ?>
<div class="block block-<?php print $block->module; ?>" id="block-<?php print $block->module; ?>-<?php print $block->delta; ?>">
<h2 class="title"><?php print $block->subject; ?></h2>
<div class="content"><?php print $block->content; ?></div>
</div>
<?php } ?>
Then, when I create a new block, all I need to do is to specify its title as "nostyle" and the content of the block would be printed without being placed inside in the <div><h2></h2></div> html code.