A company called TechRadium is suing Blackboard in East Texas (Marshall, not Lufkin) for allegedly infringing on their patent on mass notification systems. (Blackboard bought emergency notifications company NTI recently.) im+m has a copy of the complaint posted. We'll try to get some analysis posted when we can. In the meantime, if you have a chance to read the complaint and notice anything noteworthy in it, please comment on it here so that we can consolidate these observations and follow up.