Cool, I was curious also: <a href="http://www.spothistory.com/" rel="nofollow">http://www.spothistory.com/</a><p>Looks like I need to add datacenter, and you need to add OS :-)
With us-east-1.linux.m1.small prices averaging around $0.03/hour, it might make sense to just set up an instance to continuously run on spot prices instead of paying the regular $0.085/hour. It won't ever be more than $0.085/hour (otherwise users would simply switch to the standard price) and it will probably be a lot less.<p>Unless, of course, the spot price instances are somehow different due to their transient nature, but I don't see anything to that effect on the site. Is there some reason why this would not work?
Spot pricing does look good when you don't need extra EC2 instances on a regular basis and when you can write restartable applications.<p>That said, spot prices are fairly much the same as reserved instance pricing, except with reserve instances you have an extra up front fee. I (and some of my customers) simply use reserve instances.<p>I also started thinking of ways to use this, but reminded myself to not get to distracted from current work.
Great charts. Feature requests:<p>1. Put checkboxes for every type and then combine the chart for selected types. It will be great to compare m1.small for all regions, or most cheap types in us-east-1<p>2. Put a chart with calculated savings: us-east-1 m1.small cost $10 but currently is trading for $5, so the chart will show you are saving %50, etc.