We are working to get the Mac version of NovaMind 5 out asap. We did have major problems earlier in the development process, but they have been resolved, and now we are in the final stages of development. In the meantime, if you have a Mac and purchase a license now, you can use it in NovaMind 4 until the NovaMind 5 release is ready, or use the Windows version of NovaMind 5 under Parallels or Fusion.
My apologies about the email - we are currently having a problem with the automated email system. Please email firstname.lastname@example.org
and they will manually send you the download information.
I'm not sure what could have happened with the forum. It is an absolutely stock standard Simple Machines forum (which is a very widely used and stable forum system). I haven't heard of anyone else having a problem, so maybe it was just an email getting lost on the Internet somewhere.