Web 2.0 refers to a second-generation of web-based communities and hosted services – such as social-networking sites, wikis and folksonomies – which aim to facilitate collaboration and sharing between users. It became popular following the first O’Reilly Media Web 2.0 conference in 2004.
Above web 2.0 defination can be get form google/wikipedia but coming to real world web 2.0 designing styles, it doesn’t have no particular defination, but most of them believe and follow this web 2.0 designing styles.
Web 2.0 Designing Style
Simplicity and Central Layout
Simple & Intuitive Navigation
Rich Surfaces & Reflections Icons
Strong and Bright Colors
for more detail view click here
Web 2.0 Resources
Aqua Gloss Icons (you can download psd files too)
All templates in this section are FREE, tableless, W3C-compliant web design layouts designed by Template World designers. These templates have been tested and proven compatible with all major browser environments and operating systems.
Web 2.0 Icons
Web 2.0 Menus
Check out some cool web 2.0 logos
For more visit wdilogos.freehostia.com
Note all these design features are just for references, and this logos doesn’t reflect any firm or company if it exist then it’s just a coincidence, logos can’t be used with out permission of webdesigninfo.wordpress.com(santosh setty).