The top five in 2010 are Social networking, Wikis, Peer to peer sharing, Video sharing and then a three way tie between tagging, RSS feeds and Microblogging.

FORBES: Business and Web 2.0 An interactive feature

While in store, they can track trip details including tagging merchandise they liked, taking and sharing pictures with friends for instant reviews, buying surprise gifts by reviewing items liked on the store website.

FORBES: When smart phones and smart friends go shopping together

Slideshare users can also manage collections of presentations, documents, videos, etc. and watch the activity and comments for each file, in addition to other common social business features such as tagging content, following other users, sharing by email, and tracking how many people like or reshare the document.

FORBES: What Do I Do With this Customer Lead From My Social Network?