Hi Nick!
Your ~/Library/Application\ Support/VMware\ Fusion/vmInventory seems to be messed up and does not point to the correct files anymore. The entries in that file are supposed to point to the .vmx files (the VM configuration file within each bundle) but instead they point to the .vmwarevm bundles. If you have any ideas what could have caused that, please let us know... How did you import the VMs into the Fusion Tech Preview?
To fix it, try this:
Close Fusion. Launch Terminal, and run the following command (you should probably copy-and-paste it into your Terminal window 
):
cd ~/Library/Application\ Support/VMware\ Fusion/ && sed -i.orig -e 's#\([^/]*\)\.vmwarevm"$#\1.vmwarevm/\1.vmx"#' vmInventory
If all goes well, you will simply get a prompt again, and you can close the Terminal window. Launch Fusion again, and try to open your VMs. Hopefully they will work now. If you encounter any problems, let us know. The above command will make a backup of your existing vmInventory file at the time it is run.
Cheers,
--
Darius
Message was edited by: Darius Davis: Fixed the command to work with BSD-ish sed... *headdesk*