I've tried Apache Solr with Drupal but resulted in errors. Here's what happened on my two attempts:

1. The first time, the Apache Solr integration module said it couldn't find Solr, although I installed it on my Tomcat server (used Acquia Drupal)
2. On my second time, Drupal crashed with an error screen (used Drupal core)

It has (at time of writing) 124 open issues (total; bugs + feature requests + tasks + support requests) and out of the 124 open issues, 43 of them are bug reports. (that's a LOT)

So I insist not falling into the module's trick.

What is Drupal? If you are new to this, watch this 1 minute video showing the stuff in Drupal.

From:

to:

One of the things I hate about MediaWiki is that you have to use those [[Category:name]] (name is a placeholder of the category's name) links at the bottom of the page. In Drupal, you can enable tagging (makes an AJAX field for tagging; searches for existing tags), multi-select or select from a drop-down list. This could be complicated if you have to categorize/tag the article a lot of things. You couldn't simply copy-paste a comma-separated list into a MediaWiki article, but have to put those category links at the bottom of the article. This can be confusing because MediaWiki also uses the square brackets ([[ and ]]) for both internal links and "inter-wiki" links too. Also, there is no tag cloud extension available for MediaWiki.

Video by Jeff Robbins of Lullabot

For users of Drupal 4.7 and earlier, this video will guide you through a little bit of Drupal 5's features. Enjoy!
Released under the CC-BY-SA licence.

The next Drupalcon, DrupalCon Paris is just a month away! Each DrupalCon attracts 100s of 1000s of users to Drupal itself. See here and here. This DrupalCon has 739 attendees (compared to DrupalCon Barcelona which had 400 attendees).

Current Sponsors

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• Acquia
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Gold

• Radio France

Silver and bronze

see http://paris2009.drupalcon.org