[ale] in house instant message solution

[lists at serioustechnology.com (Geoffrey)]

Anyone know of an 'in house' instant message solution?  That is, 
something that does not rely on yahoo, or aol or such providers?  Is 
there such an application for Linux?

Looking for a solution for a small company that can be managed internally.

-- 
Until later, Geoffrey

"I predict future happiness for America if they can prevent
the government from wasting the labors of the people under
the pretense of taking care of them."
- Thomas Jefferson