Lojban, the Logical Language
MattArnold gave this presentation in 2005 and there has been a demand expressed for a repeat in 2006.
An artificial language with a grammar based on formal logic systems, speakable by humans and potentially by computers, designed from an engineering standpoint for functional elegance. A project by a volunteer organization of linguists and logicians that has stretched over five decades and survived an intellectual property dispute. The most sophisticated toolkit for expression that a geek could desire. Take a look under the hood.