A Facebook log-in option has not been implemented for the Wimdu Guest App just yet, but you can log in using your Facebook credentials. You can generate a password for the Wimdu Guest App by logging in to your User Account. Simply go to the ‘Profile Settings’ section, click ‘Change your Password’, and then click ‘Forgot password’. The password which you set can be used to log into the Wimdu Guest App along with the email address attached to your Facebook account. We are currently working on improving the Wimdu Guest App and will create this feature soon.