Web 2.0 is what some are calling the second coming of the internet. The main difference in this 'second coming' in opposition to when the internet was first introduced is that rather than have information fed to us and not being able to choose what to look at we can now have our own input on websites and decide what we do and don't want to find out about. Not only are we viewing websites and information put up by big corporations but we can also create, distribute/share and comment on our own media and that of other common internet users. This regeneration of the internet has allowed it to become more of a community for internet users and therefore allow those who share the same interests to collaborate and socialise. Because of this more control is given to the average internet surfer which opens up many new opportunities.
There are many examples of websites pretty much solely dedicated to user input allowing them to globally distribute their media creations and opinions, there are also many examples of websites that would have intitially just fed us information that have now made changes in order to adapt to this new form of internet.
Websites such as YouTube, MySpace and Blogger are all examples of those created in dedication to it's users creating and sharing content. Let's start with YouTube, although it has now been bought out by the giant corporation of Google and is hench with advertising, was originally brought into the world of the internet to allow average people to post and comment on videos created by themselves and other people. And this is exactly what people did, and some people who wouldn't have a had a chance of making something of themselves by conventional means have become famous almost over night for posting (not necessarily well made) videos. These videos tend to become 'viral', meaning they are soon posted everywhere and have millions of page views - a classic example is Chris Crocker's 'Leave Britney Alone' video in which he (very emotionally) portrays his feelings on the nature of Britney Spears' publicity. Million of people watched this video and Chris Crocker very quickly developed his own fan base including the production of t-shirts and the like. This has happened in many situations across YouTube - some are due to a single viral video and some are due to a series of vlogging a person has done on their lives (e.g. Meekakitty). Youtube allows users to reach each other globally with their own entertainment, and allows people to meet others with similar interests and also educate themselves about lives of others (hopefully in a non-stalker way). I see this as a very positive thing that has happened to the internet as it creates an incredibly broad community of people, and helps people realise that there are people out there who are like them! It also provides a means for deserving people to get recognised in other things such as art and music. Negative points of sites such as YouTube are of course the not-so-friendly users; as people can remain anonymous on the internet they tend to criticise or 'flame' people and their videos in an unjust and close-minded way which is unfortunate. Consequently this could be seen as a means for the development of cyber-bullying which is the downside to people being able to share themselves and what they make.
Blogger and MySpace also have similar qualities to that of YouTube, but instead focus on music (MySpace) and other various things. Blogger has a wide variety of uses as blogs can be made about anything; people's lives, help blogs, hair & beauty, education, comedy and other various things. People can also browse these and choose what they wish to read up about, whether it's a person who seems to do a lot of interesting things or somebody who writes funny articles. The ability of commenting and asking questions is also widely used. Website forums are also incredibly popular and are found on almost anything you could think of.
Conventional websites such as those that provide news articles such as the BBC website that would have originally just distributed information processed by them have made adaptations to include user opinion and content. For example there is an option to send them your opinion on a news topic, which may appear in a later news article. For sports articles, people who may have watched a game of football can post a comment about what they thought of the match to the BBC and it could appear in the article about the game the next day. There are also options to share articles or products from sites on social networks such as Facebook and Twitter. Websites that sell products also encourage user opinion by offering the option to write a review about a product they sell allowing other customers to read before buying, star rating systems are also used on these websites - a prime example being Amazon.
In conclusion, the internet has become a very different place where average users can become celebrities and opinions of normal people can be heard and discussed. Although there are downsides of spam, advertising and abusive users I think this change is extremely positive, helpful and inspiring.