Business Analytics in Drupal
Designing professional reports in Drupal is not trivial. At the same time, Drupal has one of the most advanced query builder tools (Views) that any CMS (open-source or not) has ever dreamed of. There's clearly a gap.
I've been cooking some stuff up for a while now and will be putting a presentation together for DC Drupalcon. Drupalcon topics are chosen by popular vote, so if you want to learn how to easily create awesome charts, graphs and reports in Drupal, please give a vote: http://dc2009.drupalcon.org/session/business-analytics-drupal-views