How Web 2.0 technologies such as synchronous messaging and streaming media, blogs, wikis, social networks, tagging, RSS feeds, and mashups might intimate changes in how libraries provide access to their collections and user support for that access. The following article tries to explore it. http://www.webology.ir/2006/v3n2/a25.html --Sukhdev Singh, NIC. http://openmed.nic.in