Citizen Sports, which has been in the news in recent months for developing a fantasy football game for Facebook, has purchased three of its competitors in search of a larger share of the market.

In recent weeks, the company has bought Sport Interactiva, FantasyBook Inc. and Sportacular.

Sport Interactiva is based in Connecticut and, according to its website, seeks “to bring the experience of sports content (videos, photos, news, etc.) and fantasy sports gaming to social networks like Facebook, Bebo, and MySpace.”

FantasyBook is a Bay Area neighbor of Citizen Sports and created the first “full-featured” fantasy sport offering on Facebook in the spring with its Fantasy Baseball 2008. The company’s site also lists a fantasy football application for Facebook and three other fantasy baseball offerings.

Sportacular is a Tampa-based company that develops sports applications for the iPhone and iPod Touch.

“It was more efficient in each of these cases to go out and look to acquire these companies in order to build out our market position,” Mike Kerns, Citizen Sports founder and chief executive, told Sports Business Journal.

As part of the deals, Sportacular founder Jeff Hamilton and FantasyBook CEO Jon Brelig will join Citizen Sports’ staff.

A roundup of recent posts on the FSB News page.

– Opinion Research Corp. found in a September study that not only have most social-media users conversed with brand marketers online, but they don’t even mind being contacted that way.

– The Wall Street Journal’s Nando Di Fino says that you need to try fantasy hockey, for the good of your country.

– 2k Sports’ MLB Front Office Manager sounds really cool. Despite what the marketing department might say, though, it’s no more fantasy baseball than Madden is fantasy football.

– Cricket.com thinks it’s in good position to become your go-to fantasy cricket site.

Apparently this Internet thing now provides various avenues by which we can share and collect the information that interests us. Well, now you can access many of those avenues from all the worthwhile content on FantasySportsBusiness.com.

Simply mouse over the “Share/Save” button at the bottom of any blog post or page (such as the constantly updated News page). There you’ll find a bevy of options for social-network sharing, e-mailing and more without the clutter of all the icons that appear at the bottom of an increasing amount of content around the Web.

We hope you find the new capabilities useful.