Drupal was used as the engine to power a financial analytics website that helps health care providers such as hospitals, home health agencies and nursing homes analyze their operations and financials.

You can view the site at: http://www.numveda.com/. We are in the process of tying up a few loose ends and cleaning up the logo etc - but we have a majority of the work completed.

We used Drupal 5.x with the following modules:
gsitemap - to submit sitemaps to the search engines - modified to run faster
frontpage - to change the default front page
book - for help on how to use the tools on the website (to be completed)
path - to rewrite paths to a few custom links
DHTML menus - to avoid reloading page on expand/collapse menus
adsense - for google ads

several other custom modules and nodes were developed to make it all work. the charting is enabled through SWFCharts from www.maani.us - we put together our own module - the drupal module would have proved difficult to use because of how our modules interact.