Converting to Drupal

I use the path module to give my drupal pages a user-friendly name. I've read that search engines don't like pages that have no extension. Is there any validity to this statement? Example: www.drupal.org/page vs www.drupal.org/page.php

Thanks

I have a database filled with inventory for a company. I need a way to import the database into drupal and display certain columns in a table that can be sorted by users. Since the database has 2000+ entries and I would be updating the inventory daily, it would be nice if the import would only add/update only new items. Any suggestions to go about this? Thanks!

Developing new site I faced this problem: how can we do that visitors can create account but if they want to take specific role - they should get invitation otherwise they will gain not specific role?
Maybe someone got solution?

I wrote a Python script intended to take WordPress post, user, and comment data and translate it into a file containing SQL so it can be queried in your site's database. That way, no module need be downloaded, which is kinda good at the current time since Drupal 7's pretty new, with only a few developed migration modules that may or may not be usable.

hey guys i am new to drupal

i manage to add a custom page to my drupal .
i have one problem with it ,
i am using this ("http://www.ajaxf1.com/tutorial/ajax-file-upload-tutorial.html") uploader
to upload files ,
but when upload finished , the uploader tryes to call back to the page
in order to notify the javascript that the upload is done
using this "window.top.window.stopUpload"
but it can not found the function since its inside an iframe now

I am trying to find more information about moving a Drupal site's nodes, content types, views, taxonomies, menus, and module configurations to another Drupal site. Assume that both sites are running the same Drupal version, with the same modules and module versions. The target site is a vanilla Drupal install created with a set of features that need to be retained (which is why a straight database dump to the new site won't work here), and I essentially want to shoehorn the nodes, content types, etc, into this target database that has a customized Drupal deployment.