Ah, good to know. After I restarted with more ram dedicated to my VM I ended up just doing an uninstall on TFS and starting the installation over, so all was not lost. Thanks for the info!
Is there any reason why the vhd couldn't just include everything installed and ready to go? I've already spent 2 days just getting my vm configured, and now I come to discover that the TFS installer won't continue with <1024mb ram assigned to the vm. Now I am contemplating whether to start the entire process over since you mentioned there is a bug if you don't configure TFS 2010 Beta immediately after installation.