organize movie and book lists

Sorry if this is off topic, but I thought you guys might be interested.

listal.com is a site where you can rate and organize lists of films you've seen and would like to see. You can also form groups, share, get recommendations etc. This site also works with books, music and games.

librarything.com is another great site that's a bit more sophisticated with a deeper toolset, it only works with books for now.