Facebook, long the domain of college students, recently decided to open its social networking site to the Web, allowing anyone who goes online to join.

The U.S. Justice Department cited the rapid growth of online advertising among reasons not to adopt so-called "net neutrality" rules for the Internet, in comments to the Federal Communications Commission last month.

YouTube isn't the only site to add video advertising recently. Yellow Book USA has begun an advertiser video trial on Yellowbook.com that features professionally-produced clips of several small and medium-sized local businesses. The videos run alongside advertisers' display ad listings.

Vonage was running 1 billion interactive impressions a month. So, when the VoIP telco changed its pricing, things got ugly.

You don't have to be any kind of anthropologist to figure out advertising on Facebook, says Mike Murphy, vice president for media sales at the social networking site. "Social media shouldn't be looked at as something that's so complex - just different," he says.

Email marketer BigString will destroy your messages. BigString takes its lead from the explosive interest in Web video. The emails it'll blast into a cyber black hole are video emails.

Last fall, Madison Avenue joined the corporate ranks rushing to Second Life to open virtual branches. Leo Burnett Worldwide, Bartle Bogle Hegarty and AKQA were among agencies setting up shop in Second Life to assist clients, attract tech-savvy new employees and spur digital creativity. Above all, it was a way to showcase their Web 2.0 with-it-ness and willingness to experiment with new media.

We asked some of the participants in the OMMA New York: Worlds Collide conference for their opinions on interactive advertising's most critical issues, ranging from the state of metrics to the future of pre-roll ads to the best use of user-generated content.

Success in online gaming calls for a whole different kind of creative. Despite all the new options, some experts say marketers are squandering opportunities -- placing the wrong ads in the wrong games.

With the Little Deviant-themed campaign, San Francisco's ATTIK and Toyota's marketing group have positioned the Toyota Scion xD five-door sub-compact as -- in the words of ATTIK co-founder and group creative director Simon Needham -- "a badass."