CEO David Sacks says there are now 10,000 networks and 50,000 users just one week in. Yammer’s business model is to let people use the service for free, spreading it throughout the enterprise. When and if a company wants to take administrative control over the account, Yammer charges $1/user/month. Administrators can set access controls, such as IP controls and SSL.

The company already allows interaction with the service via the site, an AIR client, iPhone, Blackberry, IM, SMS and email. This evening they’ve also launched an API to allow third party developers to build Yammer into their applications.

I met with Seesmic CEO Loic LeMeur earlier this week. Loic describes Seesmic as a video conversation platform. Loic and I discussed the Seesmic platform, video comments on blogs, service status, the Seesmic business model and his thoughts on mobile integration. Loic shared that Seesmic has over 500,000 videos and just under 1 million visitors a month.

Here’s my chat with Loic - note that I planned to put this video on Seesmic but it was over 10 minutes which is the Seesmic length.

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Popular Twitter and FriendFeed client Twhirl is announcing a major update this evening. Twhirl has added Seesmic video messageboard functionality to the Adobe Air client. Today alone, Twhirl has been downloaded 400,000 times. This update including the Seesmic functionality should help Seesmic gain even more adoption and distribution. The Twhirl acquisition might just go down as one of the smartest of 2008.

This new version offers the ability to watch Seesmic videos. Owner Loic LeMeur (he actually owns both Seesmic and Twhirl) tells me that recording to Seesmic within Twhirl is coming soon. I’ve posted a screenshot below - I actually think following the video thread is easier on Twhirl than on Seesmic.

If you’d like the Twhirl version with Seesmic functionality, download it here. The auto-update won’t be available most likely until the Seesmic recording input is added.

To be honest, I’ve been using AlertThingy for FriendFeed and I still use Twitter on Twitter.com. AlertThingy basically dies after about 12 hours of being alive and it typically won’t restart unless I reboot. Twhirl is really slick and polished! I am going to test it further and will report back on my thoughts after a couple of weeks.

Loic also shared some brand new stats with me that Twhirl represents 12% of all the tweets being sent and 5% of all the Friendfeed comments and info shared.

Loic has big plans for Twhirl and calls it a "social client". He wants it to become the "Skype of social software".

Update: Here’s Loic speaking about the new update — you gotta watch this to see how he shows off the URL for downloads - hilarious!:

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