See www.oracle.com/goto/cloud andhttp://www.oracle.com/technology/tech/cloud/index.html

Concepts

Cloud Computer, this a cluster of Physical Servers with allot of virtual machines in it:

Now available Official preconfigured images with Oracle Database 11g R1 on Oracle Enterprise Linux Release 5 Update 1 as low as 0.10$ per hour.
With 24/7 server it's 0.10$*24*31=74$ per month.
Prices from amazon :

Price	Name	RAM	CPU	Platform	Real CPU
$0.10/hour	Small Instance (Default)	1.7 GB	1 virtual core with 1 EC2 Compute Unit	32-bit	vendor_id : AuthenticAMD cpu family : 15 model : 65 model name : Dual-Core AMD Opteron(tm) Processor 2218 HE stepping : 3 cpu MHz : 2599.998 cache size : 1024 KB
$0.40/hour	Large Instance	7.5 GB	2 virtual cores with 2 EC2 Compute Units each	64-bit
$0.80/hour	Extra Large Instance	15 GB	4 virtual cores with 2 EC2 Compute Units each	64-bit

Not bad stats isn't it.


Presentation of new part of Amazon Cloud Computing tehnology(here).