Blogging has made the world a much smaller place. It has made it so that people can report on news that is going on as it happens, there is now no need to wait for the 6 o'clock news, nor is there a reason to wait for the paper in the morning.
Personally I read blogs a lot, some of the more interesting ones that I have read are:
The Daily WTF
Which is about how not to write code, as well as strange errors that people encounter on the job or out in the real world. This is good for most computer science students to look at and to try and understand the code that is posted and why it is wrong.
Ctrl-Alt-Del
An entertaining site about computer games. I read this to keep up with what is going on in the world of computer games, and all of the things that I cannot play on my computer because of how bad it is compared to what you need for todays games. It is interesting to look at some of the technology that is behinde the games that are coming out. There is also a really good web-comic.
Coding Horror
This site is another computer science related site. Unlike the DailyWTF, this site is more about doing things right the first time. There are many other topics that are discussed in this blog, but most of the posts end up being about how to get things done the right way, either through the authors experience, or through other anecdotal methods.
Twitter is a social network type mini blog site. It allows users to make many many small quick posts about what they are upto at the moment, or what they were just doing. There are many features that allow people to stay in touch like RSS feeds, and SMS notifications, as well as allowing users to comment on posts (twitters?) on their own twitter pages.
Personally, I think it depends on what you are looking for. If you are looking for a way to keep your parents (friends, the world... what ever) updated with what you are doing at the moment, then Twitter is the way to go, it is quick and easy. If you are looking to make more indepth posts (though probably not as often) then you should probably be blogging. Though, there probably is nothing stopping you from writting long posts in Twitter, much like there is nothing stopping you from making really short posts in any blog.
