Module development and code questions

I have a Movable Type blog I'm porting over to Drupal. Typical of the sort, I have a bunch of weekly archive files and a list linking to them on the front page of my site. I have a module built that handles this: it builds a block for the sidebar and the content page they link to. Right now the code assumes a single blog in the installation. I believe I can get around that (the links I build will have to pick up the "blog/#" and the page build the query accordingly).

I'm not sure why but the break thingie does not work. it just blanks off the whole of the rest of the page. what i wan't it to do is make the front page version stop there and there to be a read more link at the bottom that takes you to the rest of it.
does anyone know how to do this?

When I followed the guidelines in the admin help file to create some of my own user fields they did not work i the copied exactly what they did and they don't work! :( When I go to the edit my account page it says this: <b>warning:</b> Invalid argument supplied for foreach() in C:\mike\modules\user.module on line 981.
Any one know why? :?
Thanks

I'm having trouple with this piece of code:

Is there any module for Drupale to manage mailing lists?
I need ability to mass mailing for site subscribers.
What module are used for drupal.org mail list?
Thanks.

It bugs me sometimes that Drupal will just cut at a part in your node, without letting the user know something has been cut. So... here is what I did to fix that...
Open up node.module in your favorite editor and search for 'function node_teaser($body)'.
You should see some sections that look like this:

return substr($body, 0, $delimiter);

Replace all of them with something like this: