Evite and other providers of online invitations are reporting double-digit growth, thanks to higher postal rates and eco-conscious party givers

2007 saw the definition of advertising broaden, while the arrival of the iPhone presages a new battle for consumers. Simon Waterfall, co-founder of London ad agency Poke, shares the view from Europe

The fifth in a series examining the outlook for five sectors. S&P analysts have just one overweight recommendation: information technology

Usama Fayyad is helping the Internet giant figure out how to harness the massive amount of data it collects in ways that profit advertisers and protect Web users

Users of the No. 1 social network show they’re much more likely to engage with Presidential candidates on the Web than online adults overall

Wireless networks are more prone to spying than wired ones, but it helps to know if your more sensitive transactions are over secure servers

Mobile advertising revenues aren’t growing as fast as expected, and that could spell trouble for a bunch of venture-funded startups

A surprising Cornell experiment in posting grades; plus a look at recent research into ethical behavior, service charges, and volunteer habits

Sony’s chairman hints he’ll let other content providers and gadget makers piggyback on the PlayStation Network if they use Sony’s DRM technology

AT&T, Verizon Wireless, and other big cellular carriers are dragging their feet on approving services that could compete with their own