Informix Info needed

I have a job interview tomorrow....the job entails informix DBA requirements I have no experience with Informix, could you send me any Informix info you have on line? I have been researching it and trying to find out as much as I can about it, however not many people have even heard of it....this is really the first place I could find anyone that 'seemed' to know anything about it... I tried locating somewhere @informix.com that could send me info, but I didn't find anything under the standard help names (info@informix.com) I really would like to go into this interview with a little understanding of the Database..... Thanks Psycho