Linode recently replaced the AjaxTerm based web console with a Shell-in-a-box version. Also you can always access the console using SSH to the host instead of the web version.
Linode storage comes bundled with a virtual machine! The more you pay, the more RAM, network transfer quota, and better CPU contention you get - without any extra costs. It's hardly an apples to apples comparison.
There's no such thing as a "cloud server" that sits atop a cluster of machines and pools resources together like RAM into a single instance. VPS and Cloud Servers are identical. It's just marketing. TO THE CLOUD!
Any virtualized Linux instance boils down to a VM running on a single host server. This is true at Linode, Amazon, Rackspace Cloud Servers, etc.
Xen and KVM instantiate a virtualized kernel per VM. Virtuozzo is a container/enhanced jail and runs under the host's kernel.
It's pro-rated to the day - so if you add a Linode for the month but remove it after one day, you've ended up being credited back all but $0.67, in the case of a Linode 360.