Jaiku was originally mobile-only microblogging, as far as I remember. The web interface came later. The original client was developed for Nokia Series 60 (C++). Not sure about the server side, might have been Python. Also, the Google Apps integration came later, after the acquisition. One of the unique selling points (from Google's point of view) was (disclaimer: I'm guessing) how Jaiku enhanced S60 default Contacts list to presence.