I wrote a simple contact module and installed it here on drupal.org. The module lets people contact each other via e-mail without giving away the recepient's e-mail address. Note that this feature is only available to registered users. As can be seen, each user's profile page now has a 'contact'-tab. The actual contact form will only be present if the user has chosen to accept e-mails sent through drupal.org. This feature is disabled by default and can be enabled by checking the Personal contact form checkbox on your account's settings page.

We believe this feature will help improve communication, especially once project maintainers enable this feature. Expect more changes to improve collaboration and communication in the next few weeks. Suggestions welcome.