Useful links for integrating Twitter with PHP.

http://spaceninja.com/2009/07/twitter-php-caching/

http://css-tricks.com/snippets/php/get-latest-twitter-status/

http://thinkvitamin.com/code/how-to-get-started-with-the-twitter-api/

http://blog.ninanet.com/2010/04/19/twitter-feed-with-php

http://sitearticles.com/code/php-tutorial-fetch-and-display-tweets/

http://snipplr.com/view/16221/get-twitter-tweets/

http://dev.twitter.com/pages/streaming_api_methods

http://www.acornartwork.com/blog/2010/04/12/tutorial-twitter-rss-feed-parser-in-pure-php/

http://woork.blogspot.in/2009/06/super-simple-way-to-work-with-twitter.html

Useful links for XML Parsing using jQuery/PHP.

jQuery:

http://papermashup.com/parse-xml-with-jquery/

http://www.jquery4u.com/xml/15-jquery-xml/

http://think2loud.com/reading-xml-with-jquery/

http://www.think2loud.com/examples/xml/

http://www.switchonthecode.com/tutorials/xml-parsing-with-jquery

PHP:

http://www.sitepoint.com/php-xml-parsing-rss-1-0/

http://debuggable.com/posts/parsing-xml-using-simplexml:480f4dfe-6a58-4a17-a133-455acbdd56cb

http://fuelyourcoding.com/reading-xml-with-php/

How to redirect to another host using .htaccess?

RewriteCond %{HTTP_HOST} ^(.*)fromhost\.com [NC]
RewriteCond %{REQUEST_URI} ^/$ [NC]
RewriteRule ^(.*)$ http://tohost.com/page [R=301,L]

List of useful Drupal modules.

Node export - This module allows users to export nodes and then import it into another Drupal installation, or on the same site.

List of links for Drupal Multisite setup

http://drupal.org/node/25011

http://drupal.org/node/43816

http://drupal.org/node/291373

http://www.drupalcoder.com/story/205-drupal-multisite-in-subfolders