Social networking sites such as myspace and Facebook are a very good internet resource. Not only can you track down old friends you can also use it to see whats happening in and around your area.
While i was having a look on Facebook i found the Brisbane Lions page which gives you information about games. I also found some pages on bands that i like, and on their pages they have information about upcoming shows.
Its great for getting information and very useful. I have found that instead of events/bands/people having personal webpages, they now have a facebook/myspace/twitter page which do the same thing, and are able to update the information regulary and share with friends.
Our library has a facebook which is very useful and a very good idea. It post messages about upcoming events at different libraries which is good advertising for the event.