The Holy War has begun. Forums and blogs are full of flames on «Ajax™ vs Flash™ vs Silverlight™ vs JavaFX™». Currently it is obvious that in the near future SaaS (Software-as-a-Service) application distribution model will capture considerable part of both corporate market and home users sphere. It is estimated that about 25% of corporate applications will be distributed as SaaS by 2011. I won’t go into detail of advantages of this distribution model, as there are many publications on this topic. It is enough to say that SaaS applications don’t require installation on client computers. As a result only provider should take care of application setup, management and maintenance; this helps dramatically scrimp on software licensing and save considerable sum on hardware and IT personnel.