Show all newsletters/ why does the simplenews block need to be enabled to allow subscriptions?

I am not sure whether I should split this message into several... I'll start like this and see what the feedback is :)

I did some playing around with the simplenews module.

1) CENTRALIZE several newsletters
I added a third option to the simplenews_block() function, which is $op='all'
This prints ALL possible newsletters in one single block, and for each there's a subscribe button (i did not go as far as having a single submit button and checkboxes for the different newsletters, that should not be that difficult either but needs to touch also and simplenews_menu() and maybe simplenews_process_subscription().

This is my current additional code (only a draft):

  if ($op == 'all') {
  	// list all the newsletters
	$tree = taxonomy_get_tree(simplenews_get_vid());
	if ($tree) {
	$block['content'] = '<p>Stay informed! Be up to date! Subscribe to our newsletters!</p>';
	foreach ($tree as $newsletter) {
			$delta = 'newsletter-'.$newsletter->tid;
			$result = simplenews_block('view', $delta, NULL);
			$title = t('Newsletter: %title', array('%title' => theme('placeholder', $newsletter->name)));
			$block['content'].= "<div class=\"newsletter-node-block\"><h2>$title</h2>".$result['content']."</div>";
		}
	}
	else
	$block['content'] = '<p>Sorry, we have no newsletters currently available</p>';
	return $block;
  }

2) ALLOWS subscriptions independently from the BLOCK visibility
i do not use the automatic block from simplenews, since I print them all out together, in a node (so that they have a page for themselves, which looks better in my theme) where a snippet prints out the block.
The newsletter blocks are thus disabled.
So I was going completely CRAZY because the subscription was not working!
I could not understand why it was not getting the subscriptions...
until I found out in simplenews_menu() that there is a check for the existence of an ENABLED block:
"SELECT DISTINCT(delta) FROM {blocks} WHERE module = '%s' AND status = %d"
This does not make much sense to me... I would rather have a specific additional check whether a newsletter is enabled or not, than have the same field specifying wheter the block is visible (interface) or the newsletter is enabled (functionality).

Other little things:
3) Subscription Form
The label "E-mail: youremail" for logged-in users is outside the form; i did not study enough the drupal form apis yet, but I'd rather have it inside otherwise it limits the things you can do with CSS

for the rest, I love this module, and think with little improvements it could become totally cool!

cheers,
Stefano