Thanks for adding the Logarithmic charts. They are a needed addition to the chart toolbox.
After a quick review, I noticed the newly added charts need some additional work...
The minor tick marks on the Y-axis of the Logarithmic charts for ASP.NET AJAX and Silverlight/WPF should not be evenly spaced. I did a quick search on the net and found an example of how a logarithmic axis should display.
Example gif file from this site: http://www.intmath.com/Exponential-logarithmic-functions/7_Graphs-log-semilog.php
It is difficult to tell from the demos if the values line up with the tick marks. Test by graphing values like 1,2,3,4,5,6,7,8,9,10,20,30,40,50,60,70,80,90,100,200,300... which should all line up with the minor tick marks.
The Silverlight Demo also says Logarithmic Y-Axis when it is really graphing logs on the X Axis. The ASP.NET AJAX correctly graphs on the Y-Axis.