This past weekend’s announcement by Facebook that the company would be opening up its APIs to allow for posting of notes, videos and more has left some companies scrambling to add new functionality to existing applications. Below we’ve highlighted a handful of the ones that let you post to Facebook from a desktop client, be it standalone or something that plugs into your browser.

We’ve talked to the people at each one to see when you should be expecting to be able to make use of the new API in each app:

“Blogo already supports Facebook status updates through its integration with Ping.fm,” says Benjamin Jackson, Blogo’s technical director. “As for more robust Facebook integration, you can be absolutely certain that we’ll be running to integrate this as quickly as possible. We’ll be shooting to send out a beta next week.”

Friendbar creator Edo Segal says “we love the fact that facebook [is] opening up more services,” and “definitely plan to include support for these API’s in upcoming versions.” Segal also says he wants a higher level of access to that data. “For example, to be able to post comments to users photos and status updates, and to directly send a Facebook message to a user via the API.”

Posting of notes through Ping.fm is up and running. “We’re still assembling some other ideas on how to use their new features,” says founder and CEO Sean McCullough. Worth a mention is that many of the services on this list go through Ping.fm to re-syndicate user messages.

“Sociagami has always been committed to deep integration with social networking sites like Facebook and Myspace and we will definitely be taking advantage of the new API features in 2.0,” says Charlie Robbins, director of social network integration for Sociagami. “Unfortunately, using an API based implementation will mean that Sociagami 2.0 will not have the messaging and wall posting features that came with 1.0.”

Working on it for an upcoming build. “The video part will be an important one!” says Loic Le Meur, CEO of Seesmic which acquired/owns Twhirl. The latest version, which was released on Monday added in Ping.fm support, letting you cross post messages to your Facebook profile.

“Yes, we are actively working on implementing the new Facebook API and rolling it out ASAP,” says Regan Fletcher, Yoono‘s VP of business development. Our overall objective really is to maximize our use of the Facebook API in order to allow users who have added Facebook to Yoono to have the best possible experience and functionality.”

“It does look like some of this new functionality is available via the REST API which we use and we can run FQL queries (which we do),” says AlertThingy creator Clive Howard. “We will be revisiting this prior to the next version and if we can do then I’m sure it will make it into 3.x.” Version 3 of AlertThingy was released on Monday morning.
Apps that we pinged but have not yet responded: Flock, Feedalizr, Moodswing/blast, and Gwibber. We’ll update this post if we hear back.

(Credit: Compete.com)

The blogosphere simply loves to slurp up social-networking traffic stats, and on Monday we got a nice tasty serving of them with some new numbers from Compete.com for the month of January. The results? Facebook is in the lead, with about 68 million unique visitors, well ahead of MySpace’s 58 million. (The two are pegged at 1.1 billion and 810 million page views, respectively.)

This may be the first survey we’ve seen that puts Facebook ahead of the News Corp.-owned MySpace in U.S. traffic. It also puts Twitter as the third-biggest social-media site in the country by total page views, with only about six million unique visitors but a whopping 54 million views.

Compete’s numbers are interesting, because they often are pretty different from other analytics firms’. Here are some clarifications, explained to CNET News in an e-mail sent by Compete’s Andy Kazeniac: These are numbers stemming entirely from Web browser data in the U.S. That means that you won’t be pulling in any international numbers, where most of Facebook’s users are now, or data from widgets or third-party applications, which are how many avid Twitter users access the service. That means that it’s likely that Twitter’s reach is bigger than the numbers indicate.

What’s also intriguing is that there are a few social-media sites, like Flixster and LiveJournal, with relatively low unique visitor counts but proportionally very high page view counts, indicating that they probably have smallish bases of very loyal users.

Also pulling in notable numbers are LinkedIn, with about 11 million unique users, Classmates.com, with about 17 million, and Reunion.com, with slightly under 14 million. On the other end? AOL’s Bebo, an $850 million purchase, which Compete.com clocks in as having just shy of three million unique visitors. True, its biggest user bases are in the U.K. and Ireland, but that’s not good considering the price tag.

Still, statistics are like tequila shots. Always take ‘em with a few grains of salt and a slice of lime, and be warned that they may give you headaches.