Like all web services, certain data is collected when you visit, including IP addresses and date/time of visit. This data is typically only used for technical reasons (eg troubleshooting performance or security issues) and to provide general site traffic statistics (eg number of website hits).
Certain details are required for you to sign up for an account (eg a valid email address). This will only be used to provide the basic services used to run the site, for example password reset emails. The only reason we would disclose this is as legally required, for instance as part of a valid court order or with your permission.