Drupal 7.x

Am I right in thinking D7 doesn't have a private messaging facility?

All I can see is the contact user form, but it seems you can't use it without including your email, which limits it's appeal.

Is it possible to copy a content type?

Hello,
I created some categories using taxonomy. Then i made some contents and picked categories for them. Now the problem starts. As i go to certain category page , the contents teasers what are displayed there have same style as they have in their original form. As i change the teasers style, the contents style changes as well.

From content types->teasers I'm only able to change display of Content data ( title, body etc.. )

Dear all!

I am newbie in drupal.

I would like to have a website with a blog features and community:
- a member can post a story with photos,
- other members can comment it
- there is a part of website like a normal one with a pages constructed by my side, which members should not change.

I read about drupal that there is possibility to have drupal website like I need it with blog and community. Could you please tell me, is there already available solution, or should I program it, for example database, etc ?

The background is that I'm trying to prototype a drupal 7 site for some friends, that will (eventually) be used for their small business - they sell stuff they make.
What I need is for each different item they sell, to be assigned a unique reference number. A stock number, if you like.
The plan was to create a content type for their products, with the usual sort of entries: description, photo, etc. One of the fields was to be the reference number. Now, obviously this has to be unique - so it's just too error prone to have them manually insert a number in a field. What I was hoping for was that there would be a field type along the lines of "autoincrement integer", but there isn't. Plan B was to install a module that would add this functionality - the Serial Field module looked promising, but it doesn't work with Drupal 7.

Now, unless I'm positively barking up the wrong tree, this must be the sort of design issue that every Drupal developer who's ever created a commercial site must face. So I was kinda hoping there was a standard way of doing it. Searching through drupal.org doesn't show up anything obvious, so my question is: How do people create unique numeric fields in Drupal 7?

My local Drupal domain is http://mydomain.local

I downloaded zen theme to sites/mydomain.local/themes and it is not visible to choose in administration panel (in admin/appearance menu).

But if I moved the theme to sites/all/themes then it is visible and can be chosen. The problem is, it will be very site specific and I don't want it in sites/all

So what is the idea behind site-specific themes, is it posible or not?