Doug Green talks about some of the lessons learned from implementing MongoDB on Drupal 7 at Examiner.com. He talks about what parts of Drupal can be used with Mongo including the fields via the Field API and blocks, and which parts are not in Mongo. He also shares some specific traffic that they’re able to handle with the details of the infrastructure hardware at Examiner.com. For more information, be sure to check out the “Practical MongoDB“ presentation that Green and chx gave at DrupalCon Chicago.