Ok, in Web2.0, i saw many sites using action icon instead of text menu. Ex:
This is the menu bar using text menu [Product] [Search Article] [Place an Order] ..... This is the menu bar using icon [icon1] [icon2] [icon3] .....
You see web2.0 is just like Desktop app. In Desktop app (like Excel), they use icons a lot in menu bar (Ex: a Door icon is stand for open) & they did a good job that it made a standard in Desktop app.
So how does user feel if they see lot of icon in Web2.0 app?
Do they feel better?
Note:A Web 2.0 site may allow users to interact and collaborate with each other in a social media dialogue as creators of user-generated content in a virtual community, in contrast to Web sites where people are limited to the passive viewing of content. (Wiki)
Web2.0 like Gmail or Facebook where people can interact with the web site just like they did in a desktop app like Gmail.