Thanks; so basically if you bork your box your options are (1) netboot, and failing that (2) reinstall the OS. Reasonable enough, for the price. I suppose that this is why we have Chef and Puppet
I once firewalled myself and asked for help, a technician re-opened port 22 for me after a few hours (you can get instant support if you pay but it was for dev so I didn't care).
Not as efficient as a direct console access, but for the occasional "Oh , I just firewalled myself" moment, it's enough.