This is one of the methods we use to spread our knowledge about MDSE/Rhapsody/Doors/etc. Other methods are:
IBM DeveloperWorks (No longer supported!!)
Rhapsody4You Is still there but heavily misused by Russian hackers (сука блед!)
Rhapsody Guru (Frank Braun)
You see, enough posibilities to extend your knowledge and become an MDSE Pro real fast! About the forums: In close cooperation with IBM (Thanks Graham Bleakley!!) we decided to concentrate all Rhapsody knowledge on the IBM site. You will need an IBM ID to login but that is totally free and takes 1 minute to set up.