I have begun work on a module to integrate 37signals' Highrise product with Drupal. At this point, it is just an admin screen for entering API credentials and a modified version of the simplehighrise.php API wrapper. I'm using it for webform post-processing. I can envision tighter integration with the contact form, much like the Campaign Monitor module.
This is my first module. Would anyone have a use for this? Or ideas for what else it might do?