Module development and code questions

Hello all,
I am new to Drupal, and am quite enjoying discovering the ways in which it does things, often differently to other CMSs I've come across. One thing which I am missing is the ability to layout the site in a hierarchical manner, creating pages (or nodes) as children of other nodes. I have been using EZPublish for a little while, which is a fantastic, if overcomplicated CMS (actually it's more of an application development environment, but that's getting a little off-topic) and it does the herarchical thing really well.

I am inpressed by the taxonomy and the ways in which it can create complex relationships between nodes in a drupal site. I was mulling over the idea of creating a module which, given a hierarchical taxonomy, could 'attach' nodes to the terms of the taxonomy, thus creating the site structure. I realise that this suggestion has it's complexities, but I have a feeling that this could be a really useful feature.

This only really makes sense when using the new 'clean URLs' feature as the URL will represent the site structure. With clean URLs there is almost the facility to hierarchise pages, but this is only through the url, and there is no way of automatically creating a menu to represent these relationships. But if we were to define the path by the attachment to the hierarchy, then we can make a more sensible relationship between the documents.

For example, if I have a taxonomy as follows:

The modules available for Drupal are extensive and greatly appreciated. I am wondering if anyone is in the process of developing a newsletter module. This is the one glaring absence I see from the modules available. Ideally it would be one that allows a user to choose from multple newsletter types, while registering or editing their account and would also let them unsubscribe there. It would need all the other basic newsletter features like Html and text choices for sending as well as list management on the backend.

i see that members.module is posting e-mails of my users.
i think this`s not good, cause i promise users not post their e-mails anywhere on a site.

Who can i change this situation?

Thanks in advance!

Is anyone working on the upload of video or swfs?

Where there might be someway to have a media library of these files (including images, and thumbnails poss), meta-tagged, searchable, and also a way to embed them or link to them from other nodes?

What would that entail? Ideas?

~h

I've installed gallery module on drupal. After that, the link
"gallery" comes between "home" and "photo gallery" on the initial page of drupal.
When I clicked on "gallery" Browser says that page is not found.
When I clicked "gallery" on the page, in the adress bar it writes that:
http://my_host/module.php?mod=gallery this link doesn't work.

I would like to write a module that uses the textile parser to make my node output all nice, without giving users the ability to post html. Textile is perfect for this, but it is not released under the GNU license. It is released under an open source license though, but I was wondering if there is any problem using it to write a module for Drupal?

Here is the license: http://www.textism.com/tools/textile/license.html