I've recently released a module for Drupal 6 users that implements the ShareThis plugin.
http://drupal.org/project/sharethis
http://himerusinc.com/projects/drupal/modules/sharethis
It works in a fairly simple fashion, but works great so far. I wanted to post it here for others who may be searching for a valid Drupal solution. (I will only be developing it for Drupal 6 and beyond. For 4.x and 5.x Drupal, use the standard "share" module)
I figure since I'm already getting feature requests on the module, which are related to the actual functionality from the STAPI, I decided to join up here, and post a few of my requests, and questions when the need arises.
Great service/product, way to go Alex... yay for Denver Web Developers. :D