I am considering implementing a knock off of the EC2 query interface and dropping the whole ajaxy web interface. I can probably do this faster and better than trying to do everything in a browser. I only need to work out the aws id and aws secret key analogs and display those in the web interface. My plans are to still use myproxy usernames and passwords for authentication. Still don't have a good way to communicate with the hardware nodes, but I am thinking about xmpp or some other message queue. It doesn't look like anybody has written any documentation for using libvzctl which would have been nice, I don't like the idea of just running the commandline scripts and capturing the output it seems like too much of a perl hack.