Disclaimer
Not all of such design features are suitable in all cases. There are always exceptions, and there are many bad examples of these features being used wrongly, over-used, or done without sensitivity to the "symphony" of a site's design.
It is not possible for you to get a cake by mixing some eggs, sugar and flour together. Likewise, you can not just take all these above mentioned elements, throw them together and make a good web page.
Creating a professional designed Web 2.0 Web page needs a lot of understanding of the different forces at work. A good design solution is one that balances those forces.
Web 2.0 ?!
Many people use the term "Web 2.0" to describe:
- a resurgence in the web economy
- a new level of technological interactivity between web sites and services
- or social phenomena deriving from new types of online communities and social networks
Here is a video from youtube, maybe it will calrify your mind about what is web 2.0.
In general, Web 2.0 refers to a perceived second generation of web-based communities and hosted services, such as social-networking sites, wikis, and folksonomiesm, which aim to facilitate creativity, collaboration, and sharing between users.