I finally got the new DevCloud appliance working and tested in different appliances, thanks to Prasanna. The new appliance can be used both as a all in a box solution like the original DevCloud or you can run mgmt server and mysql on your host os and use it as a Xen server host and NFS infrastructure. It's about 862MB, and the whole setup can run within 1G RAM if you disable console proxy vm from global settings, also you may run multiple DevClouds.
It's available for download from: http://people.apache.org/~bhaisaab/cloudstack/devcloud More details on the blog: http://rohityadav.in/logs/devcloud/ Please try the new appliance and report any issues. Also help write a page on cwiki.a.o. Thanks. Regards.