We are not loading anything in-memory in advance. The volume of data should not be a real problem here and I am guessing its just hiding the real problem your application has. Unfortunately the "Remote server returned Not Found" is a too generic error that can hardly lead us to the actual problem. I will have to ask you to enable WCF tracing as this will give greater detail on the problem at hand. Once you do that please share the actual error with us.
As for your second problem - we have tried accessing the online documentation from several different machines and everything worked out just fine. Can you please verify that you are still having issues? If you are can you also verify that there isn't any filter or firewall that might be blocking you from visiting that url?
the Telerik team
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