Twitter is a network on the Web that gives real-time news and information. It does not cost anything to create a twitter account. Once you have an account, you can "follow" who or whatever. You can follow your friends, a group/network, a news channel, and the list goes on. Once the person/group "tweets" something (basically a short statement), it shows up on your "home" page. Just as you can follow whoever, people can follow you!
http://twitter.com/
http://twitter.com/
BLOG
A Journal that is online. A person can post thoughts and discussions about a certain topic or idea, and others viewing the blog can comment if they want. This concept seems to be getting more and more popular. Ideas for blogs are endless. This blog obviously had to do with this class, but if you are thinking about something - I am sure there is a blog talking about just that!
http://hunter05.edublogs.org
http://hunter05.edublogs.org