Last September we spotlighted Yammer [1] when they began offering a hosted version of their micro-blogging software for the enterprise. This week Yammer announced it was offering a version that companies could install behind the firewall. This could be helpful for companies concerned about using hosted services for online communications. The service is reasonably priced at $12/user/year. Yammer Blog [2]
Links:
[1] http://www.fiercecontentmanagement.com/story/spotlight-yammer-gives-you-twitter-enterprise/2008-09-16
[2] http://blog.yammer.com/