I just went to http://www.cocreate.com/free , then clicked ""Register and download"". This brings me to http://www.ptc.com/appserver/wcms/forms/index.jsp?im_dbkey=83671&icg_dbkey=482 , which indeed says: ""Sorry, we are currently migrating our registration process to a new platform and cannot complete your registration for CoCreate Modeling Personal Edition. This is expected to be completed by January 2009." I wasn't aware of this problem, so at this point I can only confirm that it exists. I have forwarded your question internally to find out more. Thanks for your message! Claus