The full source for the Ext.NET Examples Explorer will be publicly released very soon. At the moment, the source is only available to Premium Members with SVN access.
I am in the process of evaluating weather to use ext js directly or view ext.net.
I am looking for source code of examples. It would be really helpful in getting started with ext.net.
All big control vendors such as telerik, sancha give away example source code to help developers. I hope you do the same.