My flatmate and I have recently taken up Lojban, which is an invented language, the most famous of which being esperanto, and I was wondering whether anyone else speaks Lojban, or any invented language really and would like to discuss it?

I see the value simply as a broadening one, it forces you to think in new ways, but seeing as taking up German would require many hours of dedication, this I can dedicate around an hour per night with noticeable results. There also seems to be a fair few articles, such as this one, which people may find interesting. You can read about Lojban here.