Believe once Capita has everything in .NET they will look at WPF to replace Windows Forms, which supports Silverlight. Currently you only need .NET Framework 2.0 SP1, WPF needs 3.5, which gets deployed as part of SOLUS3, so I guess next year we'll start to see WPF appearing more and more, which can easily become web-based. Wheither or not it'll go "cloud" I guess will depend on how much money Capita will make from it.

The current problem stopping them is that most of the checking is done on the client side, that they still have some parts are non-.NET, that they let there devs have holiday