If you only read WikiCU, no more information is collected than is typically collected in server logs by web sites in general.
If you contribute to WikiCU, you are publishing every word you post publicly. If you write something, assume that it will be retained forever. This includes articles, user pages and talk pages. Your contributions will be attributed to your WikiCU account. However, WikiCU does not require that you disclose your name or email address, and therefore your account can not necessarily be traced to you.
If you nevertheless choose to type your name and/or email address when creating an account, these will remain private. No administrator or user accounts have access to your name, email address, or IP address, unless you actively choose to disclose your details.