There are many issues available In Saas, Security, Performance, Monitoring and web base Structure on SOAP or Client side, but for increase speed and load the page VMware is one solution in Server side ,In other hand for client I have experience to choose WPF (Windows Presentation Foundation ) to load and process the page from Server as Virtual Machine .

Sir my research area is clustering in data mining.

Hello sankar,

Compatibility of the Application across browser is one of the Main issue.

Since latency varies w.r.t Browsers, Various versions of the same browser and Network Speed.

Network speed & mobile cloud Transformation