Shares in Equinix (EQIX) edged up 4% in early trading Thursday after the data center reported Q4 revenue, adjusted for a one-time tax benefit, that beat estimates. Equinix said Q4 sales increased 19.5% to $506.5 million, including a $2.3 million tax gain http://finance.yahoo.com/news/equinix-reports-fourth-quarter-end-21010 0027.html. Excluding items, EPS rose to 88 cents per share, up from 35 cents per share in the year-earlier period. Equinix