Can you tell me about new web technologes in web 2.0 and how to learn them.?

Can you tell me about new web technologes in web 2.0 and how to learn them.

Can you tell me about new web technologes in web 2.0 and how to learn them.?
Separating style from content, use semantic coding (i.e. html tags in accordance to their role - no p tags for headings), use access keys, make layouts accessible for text browsers.





Otherwise, server side scripting is done by PHP or ASP.NET (mostly)... but this is not really a technology pertaining to web2.0

teeth braces