Two of the biggest online sellers - Amazon and eBay - have added Pinterest buttons to product pages.
A handful of major brands saw big growth in fans, while most others languished, according to BrightEdge .
With an infusion of capital, Facebook stands to become a serious challenger to Amazon, eBay, and more.
Amazon, Federated Media also see big gains in audience by year's end, comScore Media Metrix reports.
Big brands like Coke, Target, and Verizon are cut, as eBay, Converse and others stay alive!
Which brands will have the best social media campaigns this holiday season? Vote each week for your picks!
Snapshots of the web's top sites on a key shopping day.
Parent to Saks Fifth Avenue and Saks.com leverages social media and e-commerce innovations.
EBay deal signals verb buttons may almost be here.
Cos. are investing more heavily in original video content.
GSI Commerce is growing its marketing offerings and winning new business.
A variety of big brands are on Pandora online and in mobile.
Online auction giant picks up location-based app maker Where.com in its latest move towards local commerce.
Deal will make auction giant a major player in interactive marketing services.

June 6, 2012
1:00pm ET / 10:00am PT