I grabbed the Pro 1 and Pro 3 accounts. The end result is an aggregate of whatever you purchase, so I have 5 CPUs 2.5GB RAM and 50GB disk space. You can install as many OS as you want as long as you have CPUs and space to spare. You get a virtual space that's controlled thru a VMware console. They have a number of OS to choose from from Windows server, Ubuntu, CentOS, FreeBSD, to Debian.
I got a Debian box running, but it took quite a while to get it up to date. I was thinking of running a VPN and maybe a few other apps there. I don't know that I'd put an active website there.
Looks like the parent company is Fibernetics in Canada. This company is using the unused resources there. Don't know much about them, but it's said they have 60000 servers and 50000 customers.