Like most website operators, Zenphoto.org collects non-personally-identifying information of the sort that web browsers and servers typically make available, such as the browser type, language preference, referring site, and the date and time of each visitor request. Zenphoto.org's purpose in collecting non-personally identifying information is to better understand how Zenphoto.org's visitors use its website. From time to time, zenphoto.org may release non-personally-identifying information in the aggregate, e.g., by publishing a report on trends in the usage of its website.
Zenphoto.org also collects potentially personally-identifying information like Internet Protocol (IP) addresses. Zenphoto.org does not use such information to identify its visitors, however, and does not disclose such information, other than under the same circumstances that it uses and discloses personally-identifying information, as described below.
Gathering of Personally-Identifying Information
Certain visitors to Zenphoto.org's websites choose to interact with Zenphoto.org in ways that require Zenphoto.org to gather personally-identifying information. The amount and type of information that Zenphoto.org gathers depends on the nature of the interaction. For example, we ask visitors who use our forums or Trac ticket system to provide a username and email address. In each case, Zenphoto.org collects such information only insofar as is necessary or appropriate to fulfill the purpose of the visitor's interaction with Zenphoto.org. Zenphoto.org does not disclose personally-identifying information other than as described below. And visitors can always refuse to supply personally-identifying information, with the caveat that it may prevent them from engaging in certain website-related activities.
Zenphoto.org may collect statistics about the behavior of visitors to its websites. For instance, Zenphoto.org may reveal how many downloads a particular version go. However, Zenphoto.org does not disclose personally-identifying information other than as described below.
Protection of Certain Personally-Identifying Information
Zenphoto.org discloses potentially personally-identifying and personally-identifying information only to those of its employees, contractors, and affiliated organizations that (i) need to know that information in order to process it on Zenphoto.org's behalf or to provide services available at Zenphoto.org's websites, and (ii) that have agreed not to disclose it to others. Some of those employees, contractors and affiliated organizations may be located outside of your home country; by using Zenphoto.org's websites, you consent to the transfer of such information to them. Zenphoto.org will not rent or sell potentially personally-identifying and personally-identifying information to anyone. Other than to its employees, contractors, and affiliated organizations, as described above, Zenphoto.org discloses potentially personally-identifying and personally-identifying information only when required to do so by law, or when Zenphoto.org believes in good faith that disclosure is reasonably necessary to protect the property or rights of Zenphoto.org, third parties, or the public at large. If you are a registered user of a Zenphoto.org website and have supplied your email address, Zenphoto.org may occasionally send you an email to tell you about new features, solicit your feedback, or just keep you up to date with what's going on with Zenphoto.org and our products. We primarily use our blog to communicate this type of information, so we expect to keep this type of email to a minimum. If you send us a request (for example via a support email or via one of our feedback mechanisms), we reserve the right to publish it in order to help us clarify or respond to your request or to help us support other users. Zenphoto.org takes all measures reasonably necessary to protect against the unauthorized access, use, alteration, or destruction of potentially personally-identifying and personally-identifying information.
This disclaimer is partly based on Wordpress' disclaimer found on wordpress.org/about/privacy/ and is licensed under Creative Commons BY-SA http://creativecommons.org/licenses/by-sa/2.5/
Addition: Google Analytics / Adsense
Also, Zenphoto.org uses Google Adsense service that places and reads cookies from vistors' browsers, or using web beacons to collect information in the course of ads being serverd to Zenphoto.org.
Addition II: Hosting/Sponsor ads