What you need to know to tap social networking by creating a wiki for you and your guests to maintain.
A wiki is a web page maintained by a community or group who usually have a deep or fanatical interest in a particular subject. We want this subject to be your hotel, resort, or cruise line. By seeding the group with your own efforts, you motivate of loyal contributors.
Here is an introduction to wikis from Common Craft that discusses a particular provider called Wet Paint.